Factoring Quadratics… How? (NancyPi)

Published on May 15, 2018 by

MIT grad shows how to factor quadratic expressions. If you want to skip to the shortcut method, jump to 5:06. Nancy formerly of MathBFF explains the steps.

Follow Nancy on Instagram: https://instagram.com/nancypi
Twitter: https://twitter.com/nancypi

The shortcut method ("The Magic X") helps you factor any tough quadratic that doesn't begin with x^2 but instead begins with 2x^2 or 3x^2, or 4x^2, etc.

1) IF YOUR QUADRATIC STARTS WITH X^2: It is faster to use the normal method for factoring in this case: trial and error. Say you have x^2 + 4x - 12. You need to find two numbers that multiply to the last number, -12, AND that add to the second coefficient, positive 4. First make a list of all pairs of numbers that multiply to -12. Then check which pair also adds to positive 4. Use the two numbers in this pair to write your factors.

A) First check whether your leading coefficient (2 or 3 or 4, etc) is just an overall constant that you can factor out of every term in the quadratic. If it is, factor it out first and then use Method #1 above to factor the X^2 expression that remains.
B) If your leading coefficient cannot be factored out evenly from every term, it will be faster and easier to use the shortcut "magic X" method instead of Method #1. See this method explained at time 5:06 in this video.

For how to SOLVE QUADRATIC EQUATIONS by factoring, jump to the video: https://youtu.be/Z5MnP9da4EM

For more of my math videos, check out: http://nancypi.com

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  • Ludwig Spiegel 5 years ago

    Thank you Nancy! I like the magic X! That was awesome.

  • Amar Manoj 5 years ago

    nice to see you nancy

  • zuhaib zahoor 5 years ago

    Nancy , your videos work as ASMR hypnosis. I’ll meet u one day.

    • jon Morris jon morris 4 years ago

      Wow wow, whoa man, steady on cowboy! , If she read what you said I don’t think she’s ever goin’ to leave her house again and would use the net within the TOR browser shell after programming her own VPN, and then using an encryption app, oh and using a multiple router system.
      But, Ye, I guess she is kinda cute… lol

  • HexFloo 5 years ago

    So glad you’re back.

  • Stefan Novak 5 years ago

    I was literally just thinking today what happened to Mathbff, do some research and you’re uploading on this very same day! Amazing!

  • Cofi Eleven 5 years ago

    you saved my ass with this

  • amty 5 years ago


  • Lorenzo McGary 5 years ago

    Thanks for the explanation. Factoring quadratics throughout algebra took me forever to learn, when I first did it at school.

  • shivam thakur 4 years ago

    please put short trick for 3 & 4 degree polynomial factoring

  • Lucila Rose Francisco 4 years ago

    You should have 100 million subribers…you are better than my algebra teacher…😍

    • overlord6644 3 years ago

      pewdiepie does so he must be great at teaching math

    • dave forfav 3 years ago

      @overlord6644 XD

    • dave forfav 3 years ago

      @overlord6644 but t series has more

    • overlord6644 3 years ago

      dave forfav t series isn’t a person hence they can’t become a teacher

  • Lita P 4 years ago

    I’ve never seen that X method. It’s awesome! I struggle with this. Thank you, Nancy!!

  • Saqib Sajad 4 years ago

    How will you factorise; 2x^2+x-528 by magic star method?

    • Jeff Gaffen 3 years ago

      2 * -528 = -1056… factors of -1056 that add to +1 are 33 & -32… divide those #s (as a fraction) by the leading coefficient of 2, thus 33/2 & -32/2… reduce the fractions, thus 33/2 & -16/1… (2x+33)(1x-16)

  • Anuj Singh 4 years ago

    Awesome understanding!!!!Thanks Nancy

  • Bts Rapline 4 years ago

    ur so good at teaching ily

  • I Like Turtles 4 years ago

    Nancy, has math always come easy to you?

  • Ollie Pie 4 years ago

    pls make more, i became addicted to your videos

  • trae young 4 years ago

    Thank you for helping you helping me in my freshman in high school

    • Marcel Gomes Jr. 4 years ago

      trae young had a coma reading your comment

  • dougie mui 4 years ago

    Thanks Nancy. Clear and well explained.

  • hjrolfes 4 years ago

    Thank you! Very helpful. You’re my new hero!

  • Naif Almallam 4 years ago

    thank u nancy now I can pass my exams

  • slimegoo 4 years ago

    Hot damn! This is the best way to factor quadratics, thank you.

    • #Riser ADITYA 4 years ago

      How else u factored those??

  • Christiano Rubaldo 4 years ago

    Your voice is softer than Downy Liquid Fabric Softener

    • Luis Marin 3 years ago

      damn creep

    • Skyler Campbell 3 years ago

      i do not think she is a trans i think u r high

    • MareCow 3 years ago


    • john myrick 2 years ago

      excuse me what

    • Chamila Hiroshini 2 years ago

      Green Right Hand what the hell

  • Z 4 years ago

    Wow! I’m honestly speechless, this helped so much THANK YOUU

  • Dawie Sutton 4 years ago

    I’ve used, and have remembered the Quadratic Rule/formula. the last process looks interesting as well.

  • Reâds 4 years ago

    Are you writing backwards?????????? what……..?

    • Fatima Galadari 4 years ago

      i was also thinking of that while she was explaining

  • Kananelo Ntsamai 4 years ago

    Thank you so much Nancy, You are smart

  • Dave Garca 4 years ago

    Thank you so much! This helped me a lot!!!

  • Rima Nazarzai 4 years ago

    Nancy, this video is perfect, I can ace my 1st test on Wednesday

  • Mother Nature 4 years ago

    Nancy you leave me perplexed, i am still here trying to figure out are you more beautiful than smart or are more smart than beautiful.

    • jon Morris jon morris 4 years ago

      Again, another creepy comment… are you tryina scare her to death?

  • Matt E 4 years ago

    It literally just clicked. I had an epiphany! Thank you. I even submit my online test answers without squinting my eyes now.

  • Pacita Darwan 4 years ago


  • muhaimeen khan 4 years ago

    thanks a lot you are a life saver you made it so easy thx 🙂

  • huit xiao 4 years ago

    Nancy this made me understand me so much more thank you 😉

  • Adwait Dahiwadkar 4 years ago

    How to factorise polynomial expression with higher powers like 3,4 and more…?

  • Jonelle Cunningham 4 years ago


  • Nephtali Moreno 4 years ago

    how do you write backwards ?

    • InvetedPanda PandaMonium 3 years ago

      you can see it from the link: posted by hopehe above, that she sits behind a glass panel and writes naturally left to right using her right hand (not saying lefties are unnatural mind) and then flips the video in post processing. Although you don’t see her writing naturally during that video, If you pay attention to some of the details shown, such as the natural parting line of her hair, it gives it away that the video has been flipped so that what she’s writing appears to be in the correct orientation for the viewer.

    • ÆRO ŠPECIALIST 3 years ago

      What if she really “IS” writing backwards?

    • Everything about Makeup 2 years ago

      It is mirrored or flip

    • Vishnu Sudarshan 2 years ago

      @Bunnylow Really?? or joke soz i dont understand. its funny if joke

    • Stalker Gaming 2 years ago

      @Stephen Dumore umm… i left han…ded

  • PurpleDreamz 4 years ago

    I went through dozens of these videos and I still don’t understand the concept. I fuckin hate math

  • Dom Placa 4 years ago

    This lady explained this shit better in 9 minutes than my algebra 2 teacher could in an hour. 10/10 would watch again.

    • LibertyWolfYT 4 years ago

      Dude, algebra 2 should be using the quadratic formula… In algebra 1 you use the factoring method more…

    • KaizUp 4 years ago

      and she poppin

    • British Shorthair 4 years ago

      10/10 would wank again

    • Chloe Monaco 4 years ago


  • my sweet little cherryplum 4 years ago

    you cant have 1x when x already means 1

  • jimmy tovar 4 years ago

    can anyone explain how she writes backwords?

    • nσfαpPurєlч 4 years ago

      By hands

    • buzkxll 4 years ago

      the video is mirrored lmfao

  • Dilshan Marasinghe 4 years ago

    How have I never heard of this X method before? AMAZING

  • Emma Metivier 4 years ago


  • Wigg Wogg 4 years ago

    this was very helpful

  • nσfαpPurєlч 4 years ago

    Hii smarty teacher

  • Creative Arts 4 years ago

    Nancy you are great

  • Norlyn Reyes Rodriguez 4 years ago

    I love this teacher. This video was thousands times better than my math teacher explanation.

  • eman saber 4 years ago

    waw.. I spent 3 days trying to understand the factorisation, and you just made it in the most easiest way , thanks

  • 歩Ayumi 4 years ago

    I LOVE YOU NANCY. i was near tears minutes ago because nothing my teacher said made any sense. If only all teachers were as helpful as you ;-;

    • LOLIWINX EDITS 3 years ago

      @Q QLOKE omg samee they r both good

    • Krishna Murugan 3 years ago

      Yeah,She is very good at explaning maths to us.Thank u Nancy!!!Now I startes seeing Quadratics Expression more easy.

  • Teddy W.C harawa 4 years ago

    You are phenomenal,girl. God bless you big time

  • Eis Kola 4 years ago

    Thank u omg

  • Minion Loomer 4 years ago

    can you teach how to do factoring polynomials please thank you great videos they help so much!!!

  • mohamed meite 4 years ago

    Thanks Nancy .your video was very helpful . The x magic method is the Bess .i was looking for simple method and now i found it .thanks again

  • MG Foxy 4 years ago

    This is very helpful!

  • Beth 4 years ago

    thank you so much for your help, I will not be failing my maths test anymore

  • John Kenny 4 years ago

    This is a method mentioned in some worthwhile Maths books but it takes a worthwhile teacher to explain or use it

  • Be happier 4 years ago

    What about =0 ,at the last quation

  • D DEE 4 years ago

    If my math teacher was this attractive i would be a math genius!

    • main mast 4 years ago

      or you would purposely fail the class 10 times.

  • Billy Mills 4 years ago

    Like the new page. Glad your back!

  • Rippin Lips 4 years ago

    I honestly liked the video alot because it helped me understand how to do it better but we work our problems differently

  • abdu10 gt 4 years ago

    wow i understand it better than ever,. thxx

  • Oliver Phillips 4 years ago

    After watching some pretty complicated methods of doing this I have learnt how to do it in 6 minutes and I’m confident I can reproduce it. So good.

  • Noel Ciantar 4 years ago

    Thank you

  • ARVIND KUMAR 4 years ago

    Which country u belongs??

  • Jamie Pierrard 4 years ago

    I have been struggling with factoring forever!! THIS HELPED SO MUCH!!! thank you!!!!!

  • Dave CGS 4 years ago

    Wow! Magic X video is, IMHO, the best video Nancy ever did. How valuable is this compared to the factoring method. Seriously.

  • McDiamonds 4 years ago

    If i was there id be making sht like
    Your watching disney channel

  • Ya boi salman 4 years ago

    Thanks the gods for your explanation

  • Carol Tenneh Jambai 4 years ago

    Thanks very much I learnt a lot.

  • Cidonne Glory 4 years ago


  • Ahmad Mahmood 4 years ago

    can u be my wife? I ACTUALLY GET THIS

    • Encrypted Gamer 4 years ago

      @Innoxent Boi lol

  • shanespoelder 4 years ago

    anyone else cramming this in before a test

    • Jake Oliak 3 years ago

      Nope just watching for fun…

      yes of course who isn’t lmao

    • Franck's Notes 3 years ago

      Not me, I make similar videos. I know, nobody asked 😅

    • Aaron Lucas 2 years ago

      Literally me rn 😭

    • Chamila Hiroshini 2 years ago

      Yes mate…Just B4 the exam…😂😂

    • Alyssia 2 years ago

      Doing it in the middle of a test ✌️

  • Brandon Ochoa 4 years ago

    The big X trick does not work when you have a fraction that is whole!!! Can anyone help me

    • Ryan Govender 4 years ago

      Brandon Ochoa you fool write the fraction over 1 then

    • HackerBob 4 years ago

      @Ryan Govender no need to be an ass about it! i had the same issue

    • Laurence Man 4 years ago

      Maybe use trial n error?

    • Jason Buhariwala 4 years ago

      I honestly hate trial n error bro.

  • The Shlug 4 years ago

    Wish she was my teacher

  • Jason Buhariwala 4 years ago

    Wouldn’t it be 3(x+4)(3x-2) ??
    Please correct me if I’m wrong

    • Josh Dub 4 years ago

      No. 3 times (x+4) times (3x-2) –>>(3x+12)(3x-2) –>9Xsq – 6X +24X -24 = 9Xsq + 18X – 24

      But (x+4) times (3x-2) —>>>3xsq-2x+12x-8 —–>>Collect like terms—–>>> 3xsq+10x-8


  • Rohan Modi 4 years ago

    Better explained than basically everyone who has ever tried to explain factoring!

  • Aryan Kalra 4 years ago


  • Hannah Ferreira 4 years ago

    so if you cant find a number that multiplies to get the number that you need and adds to get the number that you need then it’s a prime one? idk im actually struggling

    • Josh Dub 4 years ago

      Then it cannot be factored further.

    • Josh Dub 4 years ago

      Just make sure you double check.

    • Jeff Gaffen 3 years ago

      Other than factoring out any possible GCF, it would be prime, yes.

  • Christopher Brownlee 4 years ago

    Thank you this is amazing and I am using your style for my classroom

  • Makenna Muller 4 years ago

    Thank you so much!! Your video saved me!

  • Deborah Belen 4 years ago

    This x method is amazing!!!!

  • Shania M 4 years ago

    Life saver

  • One Touch Football 4 years ago

    Omg the x method thing works thanks so much!!!

  • Lincoln Burkholder 4 years ago

    alright my algebra teachers spent years teaching me this shit and I never got it but now i understand it after a nine minute video? Please be a teacher lady you’re real good at it.

    • Nicolai Bülow 4 years ago

      Some teachers just shet lol

  • Synthetic Picks 4 years ago

    Damn thanks for this video it really helped me! Awesome Explanation.

  • Zach 4 years ago

    does the magic X method work on -3x^2 – 8x -1 because I couldn’t figure it out :/

    • Jeff Gaffen 3 years ago

      No unfortunately… you’d first factor out a -1 from all terms so that it starts positive… -1(3x^2+8x+1)… when you multiply the 1st & last #s you get 3, but there are no factors of 3 that add to 8… therefore your problem is not factorable past it being -1(3x^2+8x+1).

  • Nizam Nafeel 4 years ago

    I like you.nice tricks.

  • Mouaz Sy 4 years ago

    I didn’t understand any thing… you’re so cute

  • Gilberto Burgos 4 years ago

    god bless your soul! 🙂

    • Gilberto Burgos 4 years ago

      I finally understand how to factor Yay!

  • benchpresser356 4 years ago

    Thank you! You have a wonderful of explaining the material.

  • Aamir 4 years ago

    Her Explanations are sooo good, spent good amount of time at school trying to wrap my head around these concepts.

  • Alex Collins 4 years ago

    hey cutie

    • Lukeboi 76 4 years ago

      get off my christian server

  • JAZERLIGHTS 4 years ago

    Good on ya Nancy! You are a great teacher!

  • Klelia 4 years ago

    Thank you Nancy!

  • K S I 4 years ago


  • V P 4 years ago

    great video. Helps a lot

  • NtonasGamingGr 4 years ago

    Thank you you learned me something new at the end of the video

  • mike jones 4 years ago

    That magic x is 🔥🔥🔥

  • ariellovesblue7 4 years ago

    Wait.. is she writing backwards ?

  • CHAN 4 years ago

    Holly cow….she is writing backward

  • Oraka Chukwunonso 4 years ago


  • Jiwon Han 4 years ago

    Omg I have given up math for about 10 years now. But it sounds so interesting and easy thanks to her videos, I’m running all through her channel lol Thank you so much Nancy!!

  • Emvolts 4 years ago

    This was amazing!

  • TK_BT 308 4 years ago

    Nancy pls be my wife

  • Yareli Armenta 4 years ago

    Watching this before finals….

    • SKY Troopers 4 years ago

      Gud luck

    • Lucho Vargas 4 years ago

      @SKY Troopers saying good luck about 2 months after she took the test

    • Ahmad Mateen 3 years ago

      lol same

    • Aryanlul 3 years ago

      @Lucho Vargas lmaoo

    • Stalker Gaming 2 years ago

      @Lucho Vargas lmfao!

  • Anthony Jackson 4 years ago

    The GOAT! Thank you, Nancy!

  • Kevin Johnson 4 years ago

    thank you sooo much for this video!

  • Clark Huppert 4 years ago

    Wow I have never heard of the magic X before. That is a cool trick to remember.

  • Alek White 4 years ago

    Thank you very much for the video. Very well put! Two thumbs up 👍👍

  • Dale Wier 4 years ago

    Nancy I am 58 and watching because I never understood any math in high school and only took one math class in college. Could you please, as you are explaining “how to solve”, could you also explain what this is used for. And not just for this video but all of your vids. I, long ago and far away, asked this question in a math class in college when we were learning matrixs (or is it matrices, I am also a creative speller so spelling may not be correct). I was given an answer by the instructor that was in essence: “I don’t know And it doesn’t matter”. Well it does matter! I always had a hard time with something if there was not a stated or obvious application. Enjoy your vids, it’s never too late to learn. Thank you

    • Veritas et Aequitas 3 years ago

      @Rizwan Tahir To build on parabola, if you graph the sides of a fence or expected sales vs price adjustment, you get… A parabola. And the peak is the most area or the most sales at a certain price. Tells you what to price at for a sale. So many other applications you might not think of at first. Why? Some say the universe is based on math.. close… Math is a language we invented to describe the universe’s rules.

    • faysal yusuf 3 years ago

      you learnt Matrixs at college here in the uk we learn that in our gcse (qualification we take when we are 15) so imagine my pain

    • Joshua Boulton 3 years ago

      Math is just like an abstract toolbox. Just as a builder needs a toolbox, a car, a belt, a helmet, and so on, various kinds of programmers need a keyboard, a computer, a monitor, and… math. Except sometimes a builder also needs math. As for things like matrices, that’ll be in the abstract toolbox of software engineers, mechanical engineers, designers, you name it! Many programmers don’t even realise they’re using matrices.

      As for a use of matrices that almost anyone can understand, go with the one that’s typically taught first: systems of linear equations. Let’s say you’re dealing with some shape, maybe you’re building a funky sandpit for your kids. You need to work out the length of a certain part so you can buy the right piece of timber. You know a little bit about the size of that part based on the size of another part which you do know. You know a little bit more based on another part of it. You know a bit more based on the area of the sandpit. You can solve this ‘system of equations’ to stick all those facts together, using a matrix.

    • Sergio Guzman 3 years ago

      It’s super useful, let’s suppose that the area of a square It’s equal to x^2 + 4x – 12, so yo wanna know the length of a side of the square, you can solve it with this.

    • Hemlata Sharma 3 years ago

      That’s where true mathematical love exists !

  • Andras Nesztinger 4 years ago

    Who disliked this video and why?
    I teach math myself, and still enjoy this videos. Sometimes I watch them to compare, if there is an easier method out there to explain hard topics. Magic x method is really useful, as students often got confused after splitting the factors in which order to put them. Really simple and powerful

  • K B 4 years ago

    Hello Nancy …I really love your math videos …you explaine really well…..and that to from the basics you are great educator

  • mike henry 4 years ago

    May your blessings increase exponentially…love YOU…..thank you very much..

  • Phanit Phanit 4 years ago

    Thank you beautiful teacher

  • Don Blake 4 years ago

    You are a beautiful, smart Woman! I’m so glad I didn’t have you in 7th Grade Algebra! I would still be in the 7th Grade! I’m well over 30! LOL!!!!!!!

  • Nick Hull 4 years ago

    THERE WE GO. Heck yes, thank you! haha tried factoring a quadratic that had a coefficient in front of the x^2 term. MAGIC ‘X’ TO THE RESCUE.

  • Jerry PEAL 4 years ago

    Nancy Pi LoL I like it .

  • Mason Stowe 4 years ago


  • Shivam Shah 4 years ago

    Wow beauty with brain
    Your 9 minute vidio has done that thing which may math teacher count do in 6 years .
    Thank you so much

  • kamel hatem 4 years ago

    Thank you teacher & happy new year!

  • DIKSHAK MASIH 4 years ago

    What is the method of this question 6a√b+8ab√

  • Riley Bracey 4 years ago


  • harwn harwn 4 years ago

    NancyPi, absolutely fantastic and you are a great teacher.

  • rgbnights 4 years ago

    I’m starting to love math again. But what happened to the 4x in the 3rd line of the second factor example? I see the x sq. and the -2 x 6= -12…

  • Ghufran Khan 4 years ago

    Nice…. Fantastic..

  • Ghufran Khan 4 years ago

    Hii nancy

  • Abduwali Alpha 4 years ago

    Left hand and backward writing better than right hand and forward writing♡

  • REME 4 years ago

    Great video, very well explained, smart and excellent delivery. And, I must say you are very pretty.

  • Dorcia Whitebrake 4 years ago

    Nancy is amazing! She breaks the problem down so you can really get it. Thanks so much!

  • Shayon Coleman 4 years ago

    is there anything else you can teach me ?

  • bluebone, LLC 4 years ago

    this “magic x” trick doesn’t work so hot for problems like y^2 – 12y +33

    • Jeff Gaffen 3 years ago

      Only because there are no factors of 33 that add to -12… therefore your quadratic can’t be factored… it’s prime. It’s no different than not being able to simplify a fraction like 4/7… sometimes the problem is already in simplest form.

  • A problem 6ix 4 years ago

    i have a 2xpower2+9x_5 and i tried the magic trick but it dosnt work can someone help ?

    • A problem 6ix 4 years ago

      oh shit i think i got it is it _1+10 ?

    • Daito 4 years ago

      @A problem 6ix … I did this in my head how could you not get it?

    • A problem 6ix 4 years ago

      Daito lool nah bro I was tierd af when I wrote the comment turned out to be easy

  • cody olivotto 4 years ago

    Thank you. I always struggled with factoring, but the “Magic X method” has truly simplified this for me!

  • Isaac Walter 4 years ago

    Very informative, thank you very much.

  • gely 4 years ago

    ;-; I-
    seriously, I been an hour trying to figure it out how my teacher finish with his anwser because he didn’t explain the last step he just wrote it on the board!
    Thank you so much it was really simple and effective! You are ten times better at explaining then my teacher and I have two on the same class period!

  • Trisna Coyle 4 years ago

    thank you so much for your video. I finally understand how the magic x works for quadratic equation

  • Georgiy German 4 years ago

    Did you call the AC method the X magic thingy?

  • The Chronicles of SSS 4 years ago

    im hot for teacher

  • Rasjah Jah 4 years ago

    wow i love this method

  • A person 4 years ago

    u should be a model]

    • preethi tobin 3 years ago

      True bich

  • bakudonshodihon 4 years ago

    Your videos are amazing and make this stuff very easy to understand. If you are not teaching already you should do videos for online schools. My current school has us watching PatrickJMT videos from 2008. Your stuff way better. Subscribed and liked!

  • Dalton Sizer 4 years ago

    Nancy I’m so happy you do this. Several of your videos helped me to understand concept I was working on in Algebra for Business last semester because the book we were assigned did not explain anything. Everyone in the course learned the material through youtube and I found your videos to be overall the most helpful of any that I found.

  • Ian C 4 years ago

    So I’m confused.
    My book says 2x^2+ 5x – 3=0
    Then (2x – 1) (x+3) and -1 + 3 doesn’t equal 5
    Is the book wrong? Am I missing something?

    • Ian C 4 years ago

      Wait wait I think the book flipped them. But why? It’s so confusing

    • Jeff Gaffen 3 years ago

      First multiply the 1st & last #s… 2 * -3 = -6… factors of -6 that add to 5 are 6 & -1… divide them (as a fraction) by the leading coefficient of 2, thus 6/2 & -1/2… reduce the fractions, thus 3/1 & -1/2… setup the binomial factor quantities… denominators in front of the variable, numerators after it, thus (1x+3)(2x-1). Remember that multiplication is commutative so the order of the factor quantities doesn’t matter. If the problem truly is set = to zero like you stated, then the solutions are the opposites of the reduced fractions that setup the factoring, thus x=-3 & x=1/2… you don’t even need to finish the factoring process if it’s a quadratic equation to solve! 🙂

  • U raaxee Caqligaaga 4 years ago

    Thank you again dear Nancy… You are the #messi# of mathematics right.

  • Micah Mack 4 years ago

    Amazing video. Very understandable. Thank you!!!

  • PrinceEnki2112 4 years ago

    I gotta learn this in a hurry!

  • Gloria ST Hilaire 4 years ago

    Hi nancy

  • tristan luken 4 years ago

    Mr.jimenez girl

  • chaas seek 4 years ago

    You are a great teacher

  • Dan Jones 4 years ago

    Thanks for the maths help

  • Dan Jones 4 years ago

    I love you

    • Mamoon Umer Farooq 4 years ago

  • Dan Jones 4 years ago

    Can you tutor me

  • Gena Gena 4 years ago

    wait a minute, I thought that Quadric was ment to be used in algebra when you where graphing on the co-ordinate plane

  • Mr. Ulloa 4 years ago

    Thank you, I was complicating my life until I found this Video Tutorial, thank you so much!

  • Math grade 10 11 12 4 years ago

    My country this exercise in grade 10. How about your country?

    • main mast 4 years ago

      even in Arkansas USA it was 7th grade.

  • Lizzie Cox 4 years ago

    How do u frikin write backwardm/

  • Ali Ahmed 4 years ago


  • sophia loren 4 years ago

    THANK YOU!!! I’m awful at factoring and this helped so much

  • Sloth Studios 4 years ago

    i have a block schedule (which counts as 2 days of the class in one) and this wonderful individual could get me up too pace in 9 minutes, when my algebra 2 teacher had me lost after 3 days…

  • Steven Williams 4 years ago

    The MOST GORGEOUS math teacher of ALL TIME.

    • Marc Noonan 3 years ago

      Totally agree.

    • polly10022 3 years ago

      Stop bringing in womens appearance in EVERYTHING they do! Jerk.

    • Lokesh Lutchmeenaraidoo 3 years ago

      @polly10022 even if it’s a compliment

    • Prodigy 3 years ago


    • bellinghammond 3 years ago

      @polly10022 stop scolding heteros, asshole

  • SuperShooterX 4 years ago

    This “magic x” method will not/does not work for (3x+2)(2x-4)=> 6x^2 -8x -8. It turns that this method will only return the (3x+2) and only a half value of (x-2) instead of (2x-4), why is that?

    • Jeff Gaffen 3 years ago

      Because this process factors completely. Your problem (2x-4)(3x+2) really is 2(x-2)(3x+2) because there’s a GCF of 2 in the (2x-4) quantity. The 6x^2-8x-8 has a GCF of 2… factoring it out gives you 2(3x^2-4x-4)… the (x-2)(3x+2) comes from the 3x^2-4x-4 trinomial. The reducing of the fractions in this process basically eliminates any GCFs that aren’t factored out first. That’s why you should always check for overall GCFs first before doing anything else. Hope that helps.

  • Nicole Pieri 4 years ago

    OMG i sat through class today completely stumped as my teacher went over this. i tried getting my friend to help me since he’s great at math, but he kept repeating the steps and i just DIDN’T GET IT. i’ve been looking for videos on how to do this and this is the only one that’s helped me!!!! THAT X REALLY IS MAGICAL!!!!!! THANK YOU SO MUCH

  • Laura Cross 4 years ago

    Thank you so much for this tutorial! Totally saved the day with my son’s homework and he now has a system for doing this that he can use easily. None of that pesky trial and error 🙄 Thank you 😀

  • Kj Lyons 4 years ago

    Extremely helpful, thank you .

  • John Pringle 4 years ago

    Hello Nancy. I am 66 years old and am still trying to figure out math, more now as a hobby than a job requisite. Your speech delivery, no ums and awes in your delivery; every word is a gem. I washed out of civil engineering many years ago because of a teacher who couldn’t do what you do. Your speech is the right speed and your content is perfect. I have watched almost all of your videos many times and they have helped me tremendously. I bought all the Dummies, the Idiots books, and have collected text books on math over the years with little success as a result. You, as an MIT graduate, are in a unique class of professionals; the place that to a large degree, put men on the moon and will probably put people on Mars. You are a gift to humanity. You are one of the few who know it all and are willing to share your knowledge with the little people, like me. Thank you.

  • dawon kim 4 years ago

    thanks for the help

  • Mohammed Shafeel 4 years ago

    Thanks for ur tip…. It’s very useful

  • Leonardo perez 4 years ago

    are you a math teacher?

  • Kate Hunter 4 years ago

    bro she smart and good looking

  • Saleh Aboutaama 4 years ago

    Unfortunately NOT allowed in collage courses…

    • Kayleigh Griva 4 years ago

      Surely they accept it if you get the right answer right?

    • main mast 4 years ago

      @Kayleigh Griva – (robotic voice) must…do…it…their…way…and…show…your…work…earthling

    • Kayleigh Griva 4 years ago

      @main mast did you just assume my home planet?

  • John M 4 years ago

    You can factories ANY quadratic.
    ax^2+bx+c is equivalent to (1/4a)(2ax + b + S)(2ax + b – S) where S is the square root of the discriminant.

    • Deniss Artisskis 4 years ago

      John you took it from my mouth. In general ANY polynomial of ax^n + a1x^(n-1) + a2x^(n-2)……… +an can be factored into a(x -x1)(x- x2)……….(x -xn) where x1,x2..xn are the roots of equation ax^n + a1x^(n-1) + a2x^(n-2)……… +an = 0. In this case if we have quadratic expression then just solve quadratic equation as you mentioned above. Not sure why not to explain this generic way first and then show all the tricks

  • Edgar Bergeron 4 years ago

    You need to be the teacher of teachers. When you explain it I actually get it.

  • brochan11 4 years ago

    Her ability to write backwards is amazing.

  • KaizUp 4 years ago

    bro she is so bad hot damn

  • Damnedifinoah 4 years ago


  • lilian baban 4 years ago


  • Scott Park 4 years ago

    my teacher calls the magic x the xbox method

  • Jonathan Resendez 4 years ago

    Is there any way to know if it’s prime before hand ?

  • ccsvenezuela2006 4 years ago

    Who’s watching in 642.668 * pi?

  • Chrome King 4 years ago

    Suddenly I’m wayyyyyy more into math:)

  • Misty M 4 years ago

    Thank you so much. This has been explained 5 other ways but I finally get it after watching your video with the Magic X.

  • Dil Wali 4 years ago

    l like u mam
    you very beautiful

  • langaran 4 years ago

    where have you been all my life you gave me hope lols 😊😘🤩

  • Ethan Luu 4 years ago

    I’m still confused as to how she writes backwards

  • Verner Roberts 4 years ago

    This was fantastic, thanks for this video!

  • Bang Ying Gao 4 years ago

    wow. this is incredible. she explained it so well. keep up the good work! at least i know what to do now at school!

  • Ruben Cantu 4 years ago

    Thank You bery bery much..i was struggling…..

  • Dat Agent YT 4 years ago

    My school calls magic x gorilla method don’t ask I have no clue

  • Steve T 4 years ago

    Always good Nancy

  • Briana Plank 4 years ago

    Finally!! I think I finally get it…only took me watching every video known to man for factoring this ridiculousness!

  • angel sharma 4 years ago

    If you like the way she explained so please give a like for this comment please please

  • adrian torres 4 years ago

    Honestly, you are a gift sent from heaven, you explained everything in 9 minutes and it took my teacher 1 hour to explain it all and I still didn’t understand.

  • Necko Camp 4 years ago


    Doesn’t work?

    • Jeff Gaffen 3 years ago

      Yes it does. No GCF involved so multiply the 1st & last #s… 5 * -14 = -70… factors of -70 that add to 9 are -5 & 14… divide those (as a fraction) by the leading coefficient of 5, thus -5/5 & 14/5… reduce the fractions, thus -1/1 & 14/5… the fractions setup the binomial factor quantities… denominators in front of the variable, numerators after it… (1x-1)(5x+14). 🙂

  • Stoyan Cholev 4 years ago

    My teacher was literally using squares and triangles to factor and I wanted to kms thanks for helping Nancy ❤️

    • Naldo 3 years ago


  • abdoo hamdi 4 years ago

    Thank you very much

  • Adam Yang 4 years ago

    this lady is a master at writing backwards

  • Sailee Mani 4 years ago

    oh my oh my god thanks a lot Nancy this magic x method helped me a lot

  • Alejandro Rojas 4 years ago

    you are awesome cutieee

  • Jerry Wood 4 years ago

    Ugh! So great! Thank you thank you thank you! Magic X forever.

  • Jannely 4 years ago

    Yous a cutie

  • Joseph Clotfelter 4 years ago

    I was struggling to understand the concept of the X-factor. My teacher merely skimmed over it leaving me anything but understanding the concept. Thank you for the help!

  • ThePikmania 4 years ago

    This is exactly what I needed. Thank you. Interesting method that big X

  • MIRZA BABU 4 years ago

    Just wow😘… I I’m having problem in factorising since 8 the class

  • Steven Williams 4 years ago

    Your a ABSOLUTE GENUS !!!

  • warriorsanjay 4 years ago

    Thank you this helps so much!

  • Xavier Dole 4 years ago

    Thank you

  • Alexander Grew 4 years ago

    Hotter than my math teacher

  • Saeranthis 4 years ago

    What do you do if the magic x doesn’t work? Can you only use the quadratic formula then ?

    • Juanita 4 years ago

      there are other ways to factor it…like with a box… or her first method. But if you do want to, you can just us ethe quasratic formula.

      (I think)

  • Alfie Maggi 4 years ago

    I swear its called “factorising” not “factoring” or is the uk just weird??

  • John Swanick 4 years ago

    is she writing backwards???

  • Marcus 4 years ago

    is she writing BACKWARDS???

  • O O 4 years ago

    Thank you nigga my math teacher don’t teach shit right and I gotta text tommoeow god bless

  • Top 10 Facts 4 years ago

    How do you write backwards

  • Top 10 Facts 4 years ago

    The x method is just slip and slide our math teacher taught us that but it is cool how u write backwards

    • Zaid Alawartani 4 years ago

      She mirrors the video

  • Spectacular J 4 years ago

    Nancy pls bring back the kids

    • Lucho Vargas 4 years ago

      You too??? I’m trying to tell Karen

    • Spectacular J 4 years ago

      @Lucho Vargas you know her too?…

  • Everett Smith 4 years ago

    Thank you!

  • Tima Abz 4 years ago

    thanks. now i get it

  • Sarah 4 years ago

    you are my savior

  • Ahmed Alawami 4 years ago

    Intelligently beautiful ⚘⚘⚘

  • Ig/kimtaenotes 4 years ago

    Thank you you are a real life saver, I was about to fail my test this week.

  • the bean flikker chronicles 4 years ago

    X gonna give it to ya…….u are a got damn life saver.

  • khqledh 4 years ago

    Honestly, fabulous teacher! Makes everything seem so simple! Love you sooooo much! Thanks for making me reach astar in math!

  • brenda pineda 4 years ago


  • RielMarqz 4 years ago

    What’s up Pongracz

  • joje90aj 4 years ago

    Thank you, very helpful. I failed my test a few days ago and need to retake it and this helps a lot.

  • Sahib Kaur 4 years ago

    This video is cool

  • Andrews Michael 4 years ago

    I understand the x method more than any other factorization method i have ever learnt
    Thanks to you

  • Dwight S 4 years ago

    Great video!

  • Nethmi .G 4 years ago

    Omg u are such a life saver!! Thank you very much 🙂💜

  • NW3D 4 years ago

    That “trick” is not a trick. Just a long way around.

  • Makayla Kinney 4 years ago

    thank you so much this helped me a ton!!

  • juni 4 years ago

    what if they all have x in it

  • Gabrielle Fernandez 4 years ago

    Saved me from failing math ,can u be my teacher from now on

  • Steve Laber 4 years ago

    5:19 damn she sings

    • Mamoon Umer Farooq 4 years ago

      Steve Laber

  • winscience 4 years ago


  • preeti lukose 4 years ago

    so I already knew how to do this but could you explain why the two parentheses should start with x coz it’s not always like that.

    • Failafoos Prince 4 years ago

      preeti lukose it’s because X multiplied by X gives you X squared

  • jOsEpH 4 years ago

    Just use quadratic equation… delta! somebody have heard about this?

  • hermance 4 years ago

    Yet the eternal question remains :

    But …. But why ?

    • Mojosoyo - 4 years ago

      sO yOu cAn paSs yOur grADe

    • blvk svvnt 4 years ago

      Fr tho. When are we *ever* gonna use this in life? 😌

    • Admiral Panda 4 years ago

      I mean… you won’t have to with your future blue collar work, but the smart kids probably will.

    • Lightning q267 4 years ago

      Look up quadratic word problems X3
      It puts math into real world problems.
      EDIT: fixed auto correct mistake.

    • bm phil 4 years ago

      solving for positions on parabolic trajectories or parabolic lines would be one use……the x is the horizontal position……y is in the vertical….
      point stresses on catenary loaded cables……
      engineering type stuff basically…. quadratics are very common in higher order math…….calculus…….differential equations, matrix operations…..analytic geometry……

  • Bluemoon Shimmer 4 years ago

    does the magic X really work for ANY factoring quad?

    • Bob Thebuilder 4 years ago

      Not if the last number isn’t a constant

    • Nagra -_ 3 years ago

      no it doesnt

    • abdullah sultan 3 years ago

      @Nagra -_ oh really…. i didnt know. Sorry for passing on wrong information @Ayesha Younis

    • Bluemoon Shimmer 3 years ago

      @abdullah sultanits okay

    • choodle 3 years ago

      Mojosoyo – yare yare daze

  • Andrea Tomasini 4 years ago

    Thanks Nancy! thanks to you I always look good with my daughter. you are beautiful and intelligent.

  • Tushar Gaming 4 years ago

    On what are you writing

  • Erick Lamorena 4 years ago


  • Matt TheChosen 4 years ago

    One of my grandmothers could write perfectly in mirror form and with both hands, but yeah as mentioned, almost certainly this video was just flipped.

  • keveshan naidoo 4 years ago

    really helped,thank you😊

  • منوعات خفيفة 4 years ago


  • Jacob Rojas 4 years ago

    Thank you’re the best

  • Nari Kimbally 4 years ago

    I just realized she’s writing backwards. Mind blown!!

  • Idalys Herndandez 4 years ago

    this was super helpful. Thank you so much beautiful <3

  • mo gh 4 years ago

    I am arabic egyption muslim boy i have 10 years old you may amased how i now this things like this vedio i say to you i studies caculus but realy you help me iwas very afriad from factoring

  • CasualCrusader 4 years ago

    *I V E A S C E N D E D*

  • Earthdave 4 years ago

    Great work as usual. Except, I have to say, as a math teacher, I don’t like this ‘Magic X’ method. Why? Because it works but no one will understand why, and blindly memorized methods to get ‘the right answer’ are the bane of math teaching and learning. Understanding why a pattern works is much more powerful and leads to success in future topics. I don’t like ‘cross multiplication’ for the same reason; it generally replaces algebraic skills.

    • Jeff Gaffen 3 years ago

      So you recommend that students go thru “trial & error” instead… or even factor by grouping? I’ve always presented factoring trinomials in that order: trial & error, grouping, and this method here. Students will understand the beauty of it (& that it works more efficiently) after going thru the other 2 ways first. Cross multiplication should be mentioned after showing how a proportion works by going for an LCD, then they see that it’s the end result without all the fraction pain. I’m big on algebra skills too, however there are bigger fish to fry in the grand scheme of algebra than factoring trinomials or cross multiplying proportions.

  • ฉัน โจเอล 4 years ago

    You can also use the quadratic formula and the 2 ans it spits out are the numbers that u need to add to x.

  • Robert Kehdinga 4 years ago

    waoo, i really enjoyed your technics. keep it up my dear

  • Hipsto Headshoot 4 years ago

    I love it.

  • Nick S 4 years ago

    THANK YOU! I was very lost before I saw this video

  • Merieme369 zi 4 years ago

    Thank you very much

  • Forex Hack 4 years ago

    NancyPi you are amazing. That X method was out of this world. Magic X all day baby!

    • ARTHUR WASHINGTON 4 years ago

      @forexhack boi……….

  • ErrorNOTFOUND 4 years ago

    the magic X is Excellent

  • #Riser ADITYA 4 years ago


    • Jeff Gaffen 3 years ago

      @#Riser ADITYA Lol… I’m a math teacher/tutor… they call me Mr. G-Money. Yes, I like math.

    • #Riser ADITYA 3 years ago


    • Jeff Gaffen 3 years ago

      @#Riser ADITYA what do you want to know/talk about?

    • #Riser ADITYA 3 years ago

      @Jeff Gaffen Ofcouse about Mathematics Sir! Please tell me how and where we can talk

    • Jeff Gaffen 3 years ago

      @#Riser ADITYA Are you on Facebook or Twitter? Find me by my name.

  • Richard Romero 4 years ago

    If it was an ugly teacher teaching this, I would be able to learn easier but her beautiful face is distracting me

    • Sniper 50 4 years ago

      Richard Romero bruh you like -6

  • Rebecca Curran 4 years ago

    Good job, Nancy! Very simple!

  • Karen Macpherson Wessinger 4 years ago

    thank you! I have struggled and struggled with this, my algebra teachers like to have us “guess” until we figure it out. This is so awesome! Looking forward to following you thru my Trig class next semester! You are so much better than any of the professors!

  • Sports and Entertaining 4 years ago

    That’s for class 6 students.I guess class 6 to 10 very few students use to watch tutorials video on YouTube

  • Isabella Dohan 4 years ago

    oh my god, i just came here after finding out i have end of year tests that i’m going to fail. AND YOU’VE GIVEN ME HOPE!!!! Thank you!!!

    • Dana Mo_04 4 years ago

      Just a question, which school do u study in? I might know. I’m 14 and I study at NAISAK

  • Sachin Kumar 4 years ago

    Angrej kumar

  • ola dehni دروس رياضيات 4 years ago

    Hello I am also mathematic teacher but I am Arabic ,and I have figured a new way out at the end of your video .great there are new ways to solve this issue

  • Desert Rose 4 years ago

    I wish I had a teacher this beautiful in school. You are a great teacher.

  • Dana Franchitto 4 years ago

    THank you , Nancy,this is so helpful.

  • Crowding 4 years ago


  • Brodie Kuhlman 4 years ago

    Boutta take a quiz

  • HOPE WORLD 4 years ago


  • steph beauty 4 years ago

    Thanks very much . Didn’t get how to do this until I watched your video thanks.

  • cindy massicott 4 years ago

    thank you so much for sharing your knowledge with us! your a good teacher!

  • Bardamu 4 years ago

    Chere Nancy, Vous etes tres jolie et avec une tete bien faite! La beaute des mathematiques fait corps!

  • bzeliotis 4 years ago

    Great video. Thanks.
    (I think using a bolder colour like red, green , blue would show up better than pink, which is faint and washed out)

  • Adeline 4 years ago

    thank youuu… im studying for a test and you helped me a lot >_<

  • rick bartez 4 years ago

    I hang on every word you say NancyPi.

  • Rebecca Cao 4 years ago

    This made answering this problem sooo much easier!!

  • fabio silva braga 4 years ago

    Otima aula

  • Hadron Collider 4 years ago

    This is review for me and I’m trying to remember if this is real or fake, so I generated random integers and it’s practically impossible to factor. I factored the example in terms of (px+r)(qx+s) and got it in five seconds. unless the polynomial is manufactured to be factored, it’s not possible. Completing the square in a polynomial equation is easy enough, but how do you really factor trinomials in a practical situation and why would you want to do it? Or to put it another way, is factoring polynomials by themselves ever a thing in real or complex analysis or graduate-level math or is it just a silly game? because I could factor the trinomials out of the textbooks all day with my eyes closed but it bothers me that they’re fake

  • Heather Hayes 4 years ago

    thanks this helped a lot

  • Jonah Maegraith 4 years ago

    Very informative video thank you

  • Sarah Gregory 4 years ago

    What if you end up with two positive numbers

  • Gary Gutierrez 4 years ago

    Where was the magic X when I was in school? 😋

  • Clifford Rahmings 4 years ago

    Thanks for the shortcut, I honestly don’t know what I would be doing right about now if I didn’t find this.

  • David Brisbane 4 years ago

    I would watch her drying her hair even 😁.

  • Mankiran Kamaal 4 years ago

    I like how you use a pink pen that’s my favourite colour

  • Jonathan McNeill 4 years ago

    I have to say in my 49 years I’ve not seen the magic X method for factoring complex quadratics before. Thank you! I appreciate you creating this video tutorial.

  • Maryse Forget 4 years ago

    I am so grateful to you.

  • Couldn't think of a username 4 years ago

    You don’t. That’s literally how. You look at the question then you throw it in the trash and burn it.

  • main mast 4 years ago

    thx for these vids. just trying to keep my old wrinkled brain humming along. this helps. to make it more challenging flip the vids upside down and backwards and run it at 2x speed with Greek subtitles while listening to thrash metal.

  • otoniel penalosa 4 years ago

    She so beautiful

  • ALAN KOKO 4 years ago

    I really appreciate this video Nancy. Thank you

  • Hazem 4 years ago

    OMG man not all heroes wear capes

  • Tis'ur"Master'" 4 years ago

    damn, that was easy. We should have math topics like this from 1st grade to college level. Pick the best presenters for each grade and make a curriculum. This one was easy to follow.

  • Bernard Meaney 4 years ago

    I have no math brain region, but love seeing it done, so thank you!

  • Thasaddek Tomal 4 years ago

    thank you you magic woman for the magic X

  • Jedi Nitrate 4 years ago

    The Magic X method is fantastic, but what i find more amazing is the fact that you can do perfect mirror writing!

  • tek_take0ff 4 years ago

    Beauty & brains !

  • Dragita peenno 4 years ago

    I can’t thank you enough you explain really well and in a simple way!

  • KESHAV SHARMA 4 years ago

    Too much boaring

  • good guy 4 years ago

    Ok tnks i get it. If the quadratic have common factor we should factor it first thanks…

  • Anthony Wise 4 years ago

    You’re so beautiful. Please, don’t be so shy. I feel like I’ve done something bad…
    Edited: you’re a lifesaver. Thank you very much

  • Cristian Ochoa 4 years ago

    you’re the original mathbff?

    • CardiB Always 4 years ago

      Yeah mathbff was her channel and those are all her subscribers 400K+ subs. Pretty shitty seems they didn’t let her notify her own subs when she moved and put all her videos on her new channel. wth mathbff is nothing without her.

  • jakeheke 4 years ago

    You’re fantastic. Thank you

  • h1mb 4 years ago

    wife material kek

  • Noor Ul Ain Mirza 4 years ago

    I have my CIE of maths 3 days later and by far, the last method is the BEST method ive ever seen to solve the quadratic equation. All the other methods my teachers taught me were pretty confusing and i was sure that im gonna have to give up on the question of quadratic equation if it comes in the CIE. But im so relieved now thank u LOADS.

  • Achiever's adda 4 years ago

    You are the best teacher Ma’am

  • Ethereal_Mack 4 years ago

    very helpful, thankyou

  • A En 4 years ago

    Great teacher

  • raaspider 4 years ago

    i just fell in love watch me turn into a math wiz now lol

  • Alvin Lui 4 years ago


  • Alfredo Garcia 4 years ago

    You’re still teaching me even out of school lol

  • Abdi 4 years ago

    Omg u so amazing 😉
    Thanks so much ❤️❤️

  • A Sandra 4 years ago

    Thank you so much for the good explanation .In 9mins i understand all exercises.Thanks again

  • Chris Havok 4 years ago


  • KD Fitness 4 years ago

    Thank you Nancy this way is awesome

  • Kelsey - Lilly- White 4 years ago


  • Extreme. 4 years ago

    4:17 what would u do if they were prime

    • Nagra -_ 3 years ago

      tuff question my frd

  • Maryjane Gendive 3 years ago

    The magic X really helps a lot..thank you

  • Solace Creat 3 years ago

    I don’t like math, but her voice makes it worth it. Friggin’ 29 years old learning stuff high schoolers know. -_- Don’t even need math for programming, but they’re making me take a statistics class which, yay, you have to know algebra I, algebra II, and geometry for. >_< Grrrr.

  • pastel stars 3 years ago

    You really helped me thank you

  • ฉัน โจเอล 3 years ago

    For very complicated examples, you can also use the quadratic formula

  • Paul 3 years ago

    I wish you were my teacher 😉

  • Kieran Donnan 3 years ago

    I’ve been using Khan Academy which is a really great step-by-step platform for learning, but as for nuanced approaches to factoring this is easily the best and smoothest approach. There’s an elegance to the approach here which makes the maths seem far more comprehensible.

  • Kuhanga Mbariomundu Riri 3 years ago

    thanks that X magic method is really helpful

  • Lawrence Andoh 3 years ago

    Thank you so much helped me with exam

  • Ben Razo 3 years ago

    So hard to pay attention with such a beautiful lady 😍😍

  • David Bland 3 years ago


  • Yeg Yoi 3 years ago


  • Tostig Godwinson 3 years ago

    Thank you so much for helping me!

  • Rachel Reynolds 3 years ago

    I literally looked up 5 different videos to learn this, and your vid is the only one that I understand. Thank you!

  • Yasir Ali 3 years ago

    Oh man….i want to thank you so very much..they way you taught in this video about how to factor any equation is authentically appreciated.I have been looking for the good for the long time and i really wanted to learn factorization and finally i learned it from here genuinely in best way..thank you again.

  • Ambient Soda 3 years ago

    love her channel so much I cant put it into words – schools really need people like Nancy. And the brilliant thing about a maths channel is if you get bored or wanna do something else the material is still here to watch.

    One reason why I think all schools need a Moodle, and students at all levels of education look to YouTube for material in there subjects and fields of study…

  • Kashif Islam 3 years ago

    do you ever heart comments? you got 148k subs.

    • Warc Arden 3 years ago

      Kashif Islam I don’t think she reads them because 80% of them are about her looks.

    • Kashif Islam 3 years ago

      @Warc Arden yep most likely

  • JIMIN'S p r e t t y dOnGsAeNg 3 years ago

    Is it just me who doesn’t listen to what she says and figure out how she writes backwards instead?

  • prafullit medi 3 years ago

    Very helpful. Loved the Tutorial

  • TheBlueEpicGamer 3 years ago

    This is only one that im struggling with.

  • Moriigon 3 years ago

    So I’ve been doing practise with this method and I came across a quadratic that doesnt work with this method. I dknt know if I’m doing something wrong, misinterpreted something or theres a flaw with this method. Can I get someones help with this?

    This formula is:

    [I keep ending up with (7x+4)(7x+3), which verifies to 49x^2+49x+12.]

    • Moriigon 3 years ago

      Is this perhaps because it’s unfactorable? That thought just crossed my mind actually.

  • Sakib Qureshi Vlogs 3 years ago

    Well if you would be my maths teacher then maths would be my favorite subject 😆

  • Jrc Destreza 3 years ago

    would you please stop finding your x just accept that he is gone

    • Three Axis 3 years ago

      that was epic lmfao

    • Uzma Nadeem 3 years ago

      @Ace os i also cant like it bcz its on 450 likes

    • Luis Marin 3 years ago


    • •h e l l o• 3 years ago

      @BOMBON187 lol haha

    • Fanam Asiama 2 years ago

      Please tell that to our math teachers.

  • Mario Rodriguez 3 years ago

    I love you

  • Sean Hanley 3 years ago

    Beautiful Math😍😍😍

  • Philip Lombardo 3 years ago

    Nancy Pi=3.14

    • Tom H. 3 years ago

      No, Nancy Pi = 10 (at least in the eyes of geeks).

  • Utkarsh S 3 years ago

    thankyou very much for this method.

  • henlo kiti 3 years ago

    Wow you explain so well nowni understand how

  • Jeff Gaffen 3 years ago

    The one thing she didn’t mention with this process is that if you’re not trying to simplify a quadratic expression (ax^2+bx+c) but trying to solve a quadratic equation (ax^2+bx+c = 0) by factoring (because you should only use Quadratic Formula to solve when it doesn’t factor.. factoring is easier mathematically), then the solutions of the equation are simply the opposites of the reduced fractions you use to setup the binomial factor quantities… you won’t even need to complete the factoring process to be able to solve now! Watch my video (from years ago) that shows/explains this:

  • edward 3 years ago

    Subtitles are in the way.

  • AfroAmericanXpress 3 years ago

    OMG!!! The magic X method is aaaaaaaaamazing!!!!

  • happy sunshine 3 years ago

    On my tsi I have this question that says which of these is a x factor 2x-3×2+1
    Can you help me remember whats a x factor again please

  • Saurabh Sethy 3 years ago

    Thanks for the lectures.

  • JR 110 3 years ago

    Your explanation and method at the end made me able to understand. Thank you.

  • Erin Wolf 3 years ago

    Thanks for the video👍👍…you are so beautiful I almost got distracted😂😂😍😍😍

  • Saitama kun 3 years ago

    my math teacher took 20 minutes explaining about how will you past the test and ended not finishing the topic 😂

  • Barking Spider 3 years ago

    Very very rare to find someone good at math and can actually teach it.

  • Patrizia Monica 3 years ago

    You’re an angel and my professor is a demon.

    • Lover K 3 years ago


  • SaJmoN17099 3 years ago

    You forgot to mention that both of these methods WILL NOT WORK unless the value of the discriminant of the quadratic formula is higher than 0. For example, no matter how much you try, you won’t be able to factorize 2x^2 -x + 6.

    • Chester Carbungco 3 years ago

      your right

  • UrsTrulyKJ 3 years ago

    Thank you!

  • kareem beharry 3 years ago

    Your beautifull😍😍😍😍😍!

  • علي نبيل 3 years ago

    شكرا شرح جيد

  • Lolita Obolenskaya 3 years ago

    Thank you for this! Love the Magic X method. Will share for sure 🙂

  • capgains 3 years ago

    I would buy you stuff

  • DaKhylle 3 years ago

    Thx for helping! I wasn’t able to understand my teacher 🤣🤣

  • Cam 3 years ago

    Wow thank you Nancy, the x formula is very helpful!!!

  • Marvin Kagiso 3 years ago

    Why would anyone dislike a full proof way of factorizing quadratics ?

  • Peter Peron 3 years ago

    Hi there.The answer for the QE 3×2+12x-36 is (3x+18)(x-2).right??

  • Kishlay 1903 3 years ago

    How the hell did she learn to write in inverse

  • etebarek teklay 3 years ago

    I went to kcuf u

  • Diamondz_Revived 3 years ago

    That magic x stuff dont work when you have big numbers

  • Lindsey Hur 3 years ago


  • Ed Cammarata 3 years ago

    Well done,thank you, good vidio

  • Janus Ismail 3 years ago

    Sexy math teacher, your voice is so raspy, and it’s so seductive

    • LuidNathan 3 years ago

      Janus ismail weird ass

  • Dave Ridlespriger 2 3 years ago

    Bender met calculon in a bar.

  • syrenka65 3 years ago


  • J J 3 years ago

    Thank you Nancy.. It’s our pleasure

  • Tanner Powers 3 years ago


  • Mervyn Sookun 3 years ago

    You are a superstar of a maths professor..with the greatest X factor …wooooow… ( you can even be the new vogue magazine cover ) 😁

  • DJ LEGEND 3 years ago

    Youre pritty :)……. Awesome

  • K B 3 years ago

    Thank you so much! Why the heck don’t they teach this method at school…

  • Yazan 3 years ago

    why 3x^2+9x+6 does not work with the x method?
    the wrong answer:(x+2)(x+1)
    the right answer:3(x+2)(x+1)
    can some one explain this?

  • Phillip McCary III 3 years ago

    Nancy: I have never run across the magic “X” technique before. That is a wicked trick! Thank you

  • neoculturedgays trash 3 years ago

    THANK U VERY MUCH. This is a lot of help. 💜

  • Cristina Mae Dela Vega 3 years ago

    it helps me a lot

  • kamel hatem 3 years ago

    Thanks a lot! you’re an angel.

  • Upendra Nath 3 years ago


  • Ammar Khan 3 years ago

    That was just awesome – thank you

  • Ashley 3 years ago

    Is she writing backwards so we can reta it????

  • Potato SIR MEOW 3 years ago

    *I knOw alot of people say that you teach well but gee, I have watched hundreds of videos, math teaching websites and other sources (like irl teachers) but none had explained it more simple and detailed and as easy as you ma’am*

  • John Nulo 3 years ago

    Omg thankyou💯 i will take my exam this afternoon lmao

  • Jeremiah Coromandel 3 years ago

    If this button is blue, you admit to being a procrastinator

    • Wubbalubbadubdub0131 3 years ago

      Meh maybe later

    • Nint 3 years ago

      Going fishing, huh?

    • Vipul Konnur 3 years ago

      @Nint lol ikr

    • Water Melon origami 3 years ago

      I’m not going to admit to it

    • mathew thomas 2 years ago

      another success for jeremiah’s fishing business

  • Kishore Subramani 3 years ago

    Please do how to factor Cubic Equations.

  • Luca 3 years ago

    omg this was actually so helpful. thank you so much lol

  • Danny L 3 years ago

    I keep thinking about flipping the mirror image of this video in my head and its distracting me from what she’s saying.

    • Olie B 3 years ago

      Danny L lol

  • the81kid 3 years ago

    Many thanks.

  • ivan susilla 3 years ago

    Solve me 4x^2-4x-3=0 please

    • Armando Martinez 3 years ago


  • Oleksandr Prokopenko 3 years ago

    Best explanation I ever found on youtube. Love you Nancy

  • ivan susilla 3 years ago


  • Joshua Boulton 3 years ago

    Hi guys, I was wondering if anyone knows exactly *why* the magic X method works? I understand that it is fundamentally a reverse of the FOIL method, but I want to be able to prove that to myself.

    When you multiply the leading coefficient by the last term, I guess that means that in the case of a mononomial (?) such as x^2 + 13x + 36, you are multiplying 36 by the invisible coefficient of x^2, which is 1. But why are you doing that? That’s what I fundamentally don’t get.

    Thanks in advance!

  • Presila Edward 3 years ago

    This was so helpful!! Thank you!!

  • ralfalfa 3 years ago


  • Warisony 3 years ago

    i want you to be in my school TBH

  • DragonGuy GTO 3 years ago

    What’s the difference between the second and third problem? They look similar to me, also will the magic X method work with any quadratic equation?

  • Katherine 3 years ago

    I love you

  • Uh Huh 3 years ago

    Wat r u writing on?

  • Marjorie Johnson 3 years ago

    So, Im 37, and have been out of math class for a long time…in fact I’m convinced I got a B in college algebra bc I ran into my professor at a bar one night, but anyway. I’ve been trying to just see how much I could remember and I literally put my book away already and did some dishes because for some reason, quadratics are always my kryptonite. Thank you SO MUCH for this video. I just got 5 correct in a row and feel like a friggin’ magician.

  • Geralyn Pinto 3 years ago

    Unlike most of those who watch your videos, I am not a student of maths but a college lecturer in English who pursues maths as a hobby. And you have strengthened my interest and determination to work on the subject. I want to congratulate you on your systematic approach and clarity which make your lessons invaluable. Many thanks.

  • Jess the Poet 3 years ago

    Girl BLESS you

  • Sasha Sauber 3 years ago

    She’s hot and an MIT grad. I think i’m in love.

  • meg 3 years ago

    next video: u backwards write

  • lebarosky 3 years ago

    Don’t worry, I have a way!

  • Sandram Pillay 3 years ago

    Thank you for this excellent tutorial. Need to brush up my math.

  • Dominic Walker 3 years ago

    Hello Nancy, My Daughter who is prepareing for UK A-levels has found this very usefull, But, can you confirm that it does not work for all quadratics, because she tried it with this one: 3X^2 + 4X -16 and it does not work. Using the quadratic formula the factors contain square roots. Would you agree?

  • sasha I. 3 years ago

    Give this girl all my tuition money. After a full day of tearing my hair out, she helps me understand in 9 mins.

    • Home School 3 years ago

      I know easier method than this

    • Zara Evelyn 3 years ago

      @Home School share

    • Gillyguts_ 2 years ago

      Zara Evelyn innit I need to know

  • Clinton Adams 3 years ago

    Thank-you very much, you are a Godsend!

  • Mr. Catfish 3 years ago

    Did you have to learn how to write backwards?

  • Islamia Zakaria 3 years ago

    Omg thank u so much. I finally get it

  • ItsMarzel 3 years ago

    heyimbee if she was actually good at math

  • Delia Claudette 3 years ago

    omg thank u so much this was so helpful

  • E John Pantalone 3 years ago

    how is she doing that? writing backwards… with her left hand… while doing math?

  • Steve Asumadru 3 years ago

    Baby girl, you da bomb!! I hope your mathematics is far advanced: Linear Algebra, Abstract Reals.. If not, you should. You have a special gift : making mathematics simple fun and sexy.👊

    • Rob_ Scott3 3 years ago

      Steve Asumadru STFU

  • Taül Guedí 3 years ago

    THANK YOU VERY MUCH! Amazing trick… You have your like with a tone of gratitude.

  • dlr _rosa 3 years ago

    THANK YOU SO MUCH!!! I’m extremely horrible in math and I had a bunch of these for college, no matter how much I tried or how many videos I watched I just couldn’t get it, I was on the verge of my fifth panic attack when a beautiful knight in shining armor near blinded me and showed me the path! You just saved my life and my future as you gave me the spirit to not drop out of college and waste all that money, but to fulfill my destiny

  • MR. JoKeR 3 years ago

    did not understand the magic X

  • Mahmud Hossain Raju 3 years ago

    Can anyone factorize this please. (x^2)+x+8

  • Khazaan Nazeem 3 years ago

    This helped. Thanks

  • mohammed saidi 3 years ago

    This doesnt work all the time if u don’t believe me try doing 64y squared + 4y-3

  • Bao Tran 3 years ago

    shes so good at writing backwards lol

  • Jon Jones 3 years ago

    Thank you

  • Shir- Neia 3 years ago

    😮 wow 😮!!! Thank u!

  • A.C. Sib 3 years ago

    what’s the vid editing tool used for this? Or did she learn to write backwards for her channel?

  • rav c 3 years ago

    Got an exam next week. Help!

  • Luis Fernando Tarazona Herrera 3 years ago

    Thank You so very much for the complete explanation on clariffy all my doubts on quadraticts functions and reveal how exactly solve al this problems; for years this was for me a head breaking because my math teacher I do not knoe why does not explain like you now explain tyo me how solve those maths problems…. thank you so much and may God Bless you and give more patience to teach and more sweetness as you are …
    I love the way you are asnd teach …
    Thank you my lady !!!

  • Mike O. 3 years ago

    Things a teacher will never show you in college. Also really heplful to know prime factorization. Especially for tricky numbers.

  • phil CORCORAN 3 years ago

    hi could somoene show me how u would check this answer to make sure u have the original equation. thanks

  • Random Fandom 3 years ago

    When you said “this will work for any factoring problem.” I seriously though you’d said “…any f-ing problem.” Lol

  • General Cosmonaut 3 years ago

    I’m cramming for my test tomorrow as the Substitute has only given out empty packets for us to study. This video, your channel is an absolute godsend.

  • Eli Rammikken 3 years ago

    Excellent, thanks Nancy

  • Mike 3 years ago

    This was awesome! Thank you!

  • FrighteningFPS 3 years ago

    2 questions
    first: whats with the unnecessary cuts?

    *did she just write in air?*

    • Souperman 3 years ago

      FrighteningFPS she writes on a clear board which is mirrored

  • Diego Carvalho 3 years ago


  • Azania Nematandani 3 years ago

    Thank you Nancy!

  • Mark g 3 years ago

    That’s really a great video… thanks

  • Zara 3 years ago

    this legitimately saved my life and i cannot tell you how thankful I am

  • RedRedMCmusic 3 years ago

    Studying for the ASVAB and I’m over here falling in love 😍 🤦🏻‍♂️ pretty lady okay back to studying

  • josh Stem 3 years ago

    She’s just beautiful! How the hell am I supposed to focus on the questions and not her? C’mon now

  • Brian M. 3 years ago

    first person in 10 years to explain this in a way that made sense. Thank you! now I maybe wont fail trigonometry haha

    • RJ Segedin 3 years ago

      except that factoring quadratics is not trigonometry …. just sayin’…..

    • Brian M. 3 years ago

      @RJ Segedin tell that to my trig professor.

  • Jupastipin 3 years ago

    Thank you very very veryyyy much, it really helped me and still is, thank you for introducing me the magic X a a a a a a a

  • Teodorico Jose Lumang 3 years ago

    i can’t seem to factor this by using the said method does anyone know why?

    • Niko 3 years ago

      It is possible to factor this quadratic using the Magic X method. First, you find 2 numbers that multiply to get -144 (“a” term: 6 * “c” term: -24 = -144) and add to get 10. Next, divide those 2 numbers by the “a” term (6). You will then get 2 fractions. Finally, set up your factored form equation (x )(x ), place each denominator of the fractions before each “x” in the equation, and then place each numerator of the fractions after your “x” terms (CHECK THE SIGNS!!!). Be sure to check your work by F.O.I.L.ing out the factored equation. If done correctly, you should get the quadratic equation that you started with: 6x^2+10x-24. Hope this helps!

    • Teodorico Jose Lumang 3 years ago

      @Niko Can you show me your answer because i did the process and everything checked it a couple of times and when i use the foil method, my answer turns out to be wrong

    • Teodorico Jose Lumang 3 years ago

      @Niko and by the way the factors that give a product of -144 and a sum of 10 are 18 and -8.

    • Niko 3 years ago

      @Teodorico Jose Lumang The answer is 2(3x-4)(x+3)

    • Teodorico Jose Lumang 3 years ago

      @Niko Oh ok i see, it’s because i didnt factor it with the GCF method. Thanks for your response!

  • FutureEngineering 3 years ago

    This is actually really useful, thanks NancyPi!

  • Juan Cueva 3 years ago

    I loved this explanation, math seriously has widen since I was in school, my brother needed help and this video pretty much just taught us how to simplify something so difficult, you are my Go-to match teacher from now on

  • marlon e. 3 years ago

    You saved my life!!! THANKS!

  • Inquire98 3 years ago

    “Thank GOD”, and thank you very much ☺️ That was REALLY EASY and REALLY good 😎 😉

  • Pakijah Shahjadi 3 years ago

    It’s good to see you again

  • Jay J. 3 years ago

    anyone else put the speed on 1.25?? no…ok…

  • Soso Ahmad 3 years ago

    thank you you made my life easier

  • Trey Cumberbatch 3 years ago


  • StevenThunder 12 3 years ago

    I don’t know if you’ll read this, but thank you so much, you and Brian McLogan helped me. I’ll sub. The teacher didn’t get to show us the magic X method before we went on break

  • Abbie Cullen 3 years ago

    hi nancy u are god

  • kenia e 3 years ago

    Wow I love watching her videos she makes everything so simple and easy !

  • Kingdom Axe 3 years ago

    Wow, amazing job

  • Sami Herzallah 3 years ago

    OMGG <333
    ur so good

  • Rene그냥 3 years ago

    This was so useful wth

  • Ibraheem Luqman 3 years ago

    How the hell is she writing on the screen like that🧐

    • The Concept Of Life 3 years ago

      a clear board

  • Lynda Wawe 3 years ago

    Thank you so much. This really helped me in completing my assignment.

  • Sexy Gandalf 3 years ago

    Thank You ! this video was so helpful

  • reem yousef 3 years ago


  • Quacker Games 3 years ago

    It says it’s wrong ;-;

  • Jacob Charo 3 years ago

    Ok, so, back in the day, I used to love math. However, that was before they threw letters in the mix. Finally got the hang of that for the most part and then they decided it was a great idea to throw in shapes and I was done lol. Anyways, my point was, I didn’t love it so much anymore and wasn’t having much fun. That is until I started watching your videos. Now, I can solve the problems easily and math is fun again. Makes me feel smart again – that means the world to me. All that to say, you just helped a ton! Thank you so much. Keep up the great work. All the best…

  • Krissy Heard 3 years ago

    Now how would magic X work for equation: 3x^2 +4x-5 ….. Testing it and it does not work.

  • MA Khan 3 years ago

    How t solve the following expression by applying the last method that she described which can be used to solve any quadratic.  2x^+13x +15

  • ᴋʏʀø Ψ 3 years ago

    well explained video ngl

  • kirito chung 3 years ago

    thank you love you so much

  • perfect penguin 3 years ago

    im so tired im falling asleep.

  • Goofy Goober 3 years ago

    Sooo how about when I have 4 terms?

  • Bobby Poly 3 years ago

    You outsmart my 70year old (very smart) math teacher!!

  • Calem Jenkins 3 years ago

    I couldn’t focus I was too busy getting lost in your eyes

    • Caitlin 3 years ago


  • neil troupe 3 years ago

    can I marry you

  • Rajesh Acharya 3 years ago

    What benefits in our practically life??????

  • Jer Bear 3 years ago


  • J0Y ??? 3 years ago

    How to do 5b^2-35+50

  • The-T Channel 3 years ago

    Thank you for this video it was very helpful 👏🏽

  • Tristan Hurley 3 years ago

    Writing backwards so naturally is the most impressive thing about this.

    • Andrew Van-Martin 3 years ago

      I’m pretty sure she just flips the video after recording so that she can write normally

  • Felicia 3 years ago

    thank you

  • Lucie-Melodie Houessou 3 years ago

    the magic x method didnt work with this: 2x^2 +X -15

  • mariam g.w 3 years ago

    Thank you soooo much it took me 3 yrs trying to understand and you made me understand in some minutes❤

  • LV Teach Me 3 years ago

    Thank you! Concise, speak clearly, and easy to follow.

  • Darimi Adeniba 3 years ago

    Thank you sooo much

  • flamingskoda 3 years ago

    Excellent video, thanks. The magic x is a gem. Great help to us home-educators.

  • zizwe allette 3 years ago

    wow, thanks

  • Nick Wijker 3 years ago

    Thank you, It clicked before the 4 minute mark.

  • Isaiah Gaming 3 years ago

    who else has cpm math and isn’t learning anything

  • DANIEL STAINIER 3 years ago

    Thank you

  • Melissa Deans 3 years ago

    Thank you so much. This video helped me a lot.

  • Gary Hughes 3 years ago

    After many years of being baffled by quadratic equations I’m at last getting some idea of what is actually going on. Thx Nancy.

  • nathan blade 3 years ago


  • Math Help by Dan 3 years ago

    Are you writing on glass and videoing from the other side? How did you do the video?

  • Lisa Crismon 3 years ago

    Nancy has helped me through years of high school math, and now college calculus. I don’t know where I would be in math without her.
    I hope she knows how appreciated she is by students all over the world, she’s such an amazing teacher!

  • Mr Blogger 3 years ago

    My Love !

  • Jayla Blackman 3 years ago

    You explained it soo much easier than my Algebra teacher

  • ZKillerWolfz 3 years ago

    You are super attractive <3

  • Jesse chima 3 years ago

    Wish my maths teacher was as cute as you. I’d be the 2nd pythagoras now.

    • Angela Peters 3 years ago

      hi how do we get the first No 4 in this guadratics formula thanks David(uk)

  • forever SHAMPOO 3 years ago

    nancy so fine

  • Armando Fernandez 3 years ago

    now you got my like and a new subscriber. U R AWESOME!

  • Robert Abell 3 years ago

    Thank you so very much. I am having learn this because at my age I am having a child and want to be able to help with homework.

  • Patrick Guillory 3 years ago

    I need to marry you so I can learn math.

  • yamuimohoshi 3 years ago

    how are you the only person that explains stuff so i can understand it?!?!?!?!

  • gabriel arcebuche 3 years ago

    do we need to simplify it???

  • linandy1 3 years ago

    I like that trick.

  • Zyro Phante 3 years ago

    Literally the best explanation I’ve ever seen on how to factor quadratics

  • Omar Belanouane 3 years ago

    Can u solve x^2-x+24 with ur magic X plz

  • Asaba Ndimofor 3 years ago

    she was literally writing backwards perfectly

    • Rebecca Mazibuko 3 years ago

      I would like if you can help me with grade nine mathematics….please

  • Ryan Michalski 3 years ago

    I have to thank you so much for making this video. The way my teacher explained it makes no sense and aside from using one of those math apps i had no clue how to do these problems. Your video really helped me, i still dont get every part, but i get it more now.

  • Ulus Jason 3 years ago


  • Danielle Chad 3 years ago

    that was so helpful thank you so much

  • Mahaley Thomas 3 years ago

    its not that bad

  • BiscoWild 3 years ago

    Holy shit thank you

  • Andrea Pullen 3 years ago

    7:32 XD

  • Czar Ravela 3 years ago

    t h a n k y o u 😔

  • simon berhe 3 years ago

    wow that was amazing !!!!!!!!!!!!!!!!!!!!!

  • Vukjovan 3 3 years ago

    Omg thank you so much the only person on youtube that explains it well

  • 彡elle 3 years ago

    yea ok but i got 15 on top and -8 on the bottom so how do i do that

  • David Hill 3 years ago

    this video really helped a lot so many thanks for sharing 🙂

  • Awesome King jeffery Gaming 3 years ago

    You are really pretty ngl have an exam and forgot how to do factoring thank you so much

  • Sidra Akbar 3 years ago

    U r my favourite

  • Liana X 3 years ago

    It doesn’t work

  • Raghad Tweissi 3 years ago

    Thank you very very much
    You are a great person 💛💛🌸🌸🌸

  • Evil Rooster 3 years ago

    Thank you so much

  • Evil Rooster 3 years ago

    you helped me a lot. I don’t know how to thank you.

  • S G 3 years ago

    this is why math will never be easy

  • Sampson Ekwet 3 years ago

    Oh my goodness. the X rule that you just talked about is the coolest. It makes this factorization stuff so easy. Thank you so much NancyPi!

  • Lauren Bridgman 3 years ago

    @NancyPi but what if you get a mixed number after simplifying your fractions on either side? For example with 6x^2 – x – 12

  • Prodigy 3 years ago

    Any tips for when the coefficient of x squared is a large number?
    Example: 25x^2-60x+36

  • Freddy Mack 3 years ago

    Brilliant, and much more so for not being a shouty man (or woman)

  • Dimensional Artist 3 years ago

    Ok this is a neat way to show factoring

  • Heather Lee 3 years ago

    From her point of view, is she writing backwards…? Another leftie! ;D

  • jessica santala 3 years ago

    omg thanks for this its so helpful!

  • J K 3 years ago

    I can never remember how to factor! I keep coming back to this video. Thank you!

  • Jacqueline Grant 3 years ago

    she needs to give more detail

  • Razia Sultana 3 years ago

    Oooh,my gawwd,did she write on my screen,what is THIS SORCERY??

  • Anjana Chandran 3 years ago

    Thank you so much !

  • Aarón Argotte López 3 years ago


  • Tab Hazlewood 3 years ago

    Thankyou so much you video is a lifesaver for my maths homework

  • Alejandra Morales 3 years ago

    Thank You!!

  • Sampson Ekwet 3 years ago

    I am unable go factor this quadratic equation 2X² + X – 2 using the magic X rule. Can someone help me?

    • Cadence Rudd 3 years ago

      That expression is not possible to factor

  • Grimmity Mobile Gaming 3 years ago

    Hahah nice work speaking fluidly while also focusing hard on writing backwards 😀

  • Warsin 3 years ago


  • Abigail ! 3 years ago

    what if there’s no c??

  • Annika Badkul 3 years ago

    she looks like shes being forced to film this video

  • Donny Helvey 3 years ago

    Where were you in 1981??? Love these videos!!

  • Laurel Chanté 3 years ago


  • Matthew Buis 3 years ago

    I have a D-F in Math, and in all my other subjects I have a 3.8 grade average. Doesn’t really make sense right, haha. Anyway this helped so hopefully it will bring my grade up. I’m subscribing thanks so much!! 🙂

  • Karina 3 years ago

    because of you I will no longer fail my final. thank you so much!

  • Ilonna CHEN 3 years ago

    I told my math teacher this and he face was like “wtf ho dos dis wok”

  • Lex Luthor 3 years ago

    Whats 3x + 2 – 2xsquared

    • Lex Luthor 3 years ago

      Can’t find 2 numbers that add up to positive 2 and multiply to negative 6 🥴

  • Dana Franchitto 3 years ago

    THank you, Nancy. this was most helpful.

  • Md razu Ahmed 3 years ago

    Hello iam Razu from Bangladesh

  • Tariq Ahmad 3 years ago

    Thanks NancyPi. Used this to teach my boy A for his GCSE’s. If he gets top marks (Aug 2020) will post again on here. Fingers crossed and thanks for a great vid.

  • Ana Alicia de Paz Noriega 3 years ago

    You have just earned a spot in my graduation speech, you, Brian Mclogan and the mathantics guy are the reason I will even get to graduate.

  • Orlando Cesena 3 years ago

    Thank you much! This helped!

  • yelesani w Mwale 3 years ago

    Thank you…. 谢谢你

  • Ali Tahir 3 years ago


  • luvhate232 starlight123 3 years ago

    ok but my problem is x^2 -x-42 what equals to 42 and x???

  • serena ! 3 years ago

    how should I use the magic x method for 3m^2+19m-14??

  • ImLimbo 3 years ago

    nancy I just wanted you to know that writing like that is a talent and you should never let anyone tell you otherwise

    • ImLimbo 2 years ago

      upon retrospect I’ve realized the video is flipped

  • Nunya Bizness 3 years ago

    7/10 would math

  • amir 3 years ago


  • Tariq Ahmad 3 years ago

    Had to watch again, still amazingly useful.

  • NickSuset325 3 years ago

    can I go to the bathroom, please

  • Alex Quiroz 3 years ago

    Thanks for saving my life once again 🥺

  • Alcatráz Ecuador 3 years ago

    how tf she writing backwards

  • Stephen Lee 3 years ago

    What happens when your fractions aren’t in their simplest form and have a remainder left over?

  • KingCrimsonJOJO 3 years ago

    Can i factor both the coeffecient and the x?

    • Lukas O. 3 years ago

      why dont you try it yourself? 😉

      math is all about experimenting.

  • Zach Ahlgren 3 years ago

    Fuck I had to sub 🤩

  • jalaj61 3 years ago

    Thanks from India Pune

  • LFLV 20 3 years ago

    this is wrong she is writing (x-2)(x+6) instead of (x+2)(x-6). the reason she’s writing it wrong is that the original formula is written (x-a)(x-b)so when u have a=-2 and b=6 you’ll go for (x- -2)
    (x- +6)which gives us (x+2)(x-6). please pay attention to this 454.093 people learn it wrong dont be one of them!

    • Cadence Rudd 3 years ago

      All of her answers are correct dude, I multiplied the binomials and they are correct.

  • MegaDee911 3 years ago

    Thanks for the Magic X, its helped me tremendously!

  • John Vandersall 3 years ago

    NancyPi how can this help me in my life i want to understand but i am a dumb shit you are a awesome teacher

  • OUT DOORS WITH IZAIAH 3 years ago

    My mid terms is coming up this month this vid helps soooo much thanks and Happy New years

  • jimena serrano 3 years ago

    this was very useful thank you

  • David Z 3 years ago

    4X^2 + 8X +7 doesn’t seem to work with magic x

    • Cadence Rudd 3 years ago

      That problem isn’t possible to factor.

  • Ayanni Everett 3 years ago


  • Lindsey Anthropology BA 3 years ago

    Hi Nancy, your Magic X method works so well. Thank you!!

  • Marcus Po 3 years ago

    Where r u from Nancy?

  • Muna Dorgham 3 years ago

    She is…very proficient in writing in reverse…..

  • Walap Ziawong 3 years ago

    The most helpful maths teacher of all time😍

  • Roberto Dizon 3 years ago

    NancyPi you are really great in making this factoring easy to understand using your tricks.. i am inspired to do videos related to rhis one feel free to visit my channel.. this is really helpful more power to your channel ghank you.

  • yousif al asady 3 years ago

    I love you nancy

  • Veritas et Aequitas 3 years ago

    You can also just plug in the -2 and 12 as coeff of x., 3x^2 + 12x -2x -8, then factor by grouping. Grouping won’t matter if you do it right. Seems simpler and just as fast, not as much change to make a mistake, but ymmv.

  • Timmy Telebrant 3 years ago

    I cant understand what i am doing wrong with the ” magic X “. I always get the opposite ” + ” and ” – “. If answer is +3, i get -3 etc…

  • Cadence Rudd 3 years ago

    Just fyi theres some info missing from this video that will cause you to get the incorrect answer. for example 6x^2 + 14x + 4 …. the “magic x” method will give you (3x+1)(x+2). The issue is this answer is incorrect unless you include a factored 2 which is lost using the x method. Correct Answer = 2(3x+1)(x+2). If you are using this method on a test and dont confirm your answer is correct you could get a lot of answers wrong.

  • Solomon McDonald 3 years ago

    Thank u for all the videos this has help me alot in csec for grade nine and I would really appreciate and it would help me if the videos keep coming 👍

  • VB Dave Copped some drip 3 years ago

    Very helpful better than my math teacher

  • Junkrat 3 years ago

    What about when the number can’t go in the others nicely ;-;

  • Ruben Zapien 3 years ago

    Your videos are great! I really appreciate the help here!

  • Numaaan 3 years ago

    nancy you’re hot

  • vili vont 3 years ago

    Nancy, thank you for all the tutorials, very beautifully done 😉

  • Cherry Crisco 3 years ago

    Wait. On the third example, how does the end part become -8? Isn’t that supposed to be 3xsquared +10x minus 8? I’m trying to learn again and now I’m confused??

  • AlphaShadesYT 3 years ago

    Our math teacher just told us to go watch math videos lol

  • Asyif Ranul 3 years ago

    I just wanna say thank you because this has helped me so so so much in my maths class, and I took about 3 hours in the middle of the night trying to understand it because of my ADHD, So I’m really proud of that! ^O^ Once again, Thank you so much!!!

  • Mohammed Saleem Moossa Damry 3 years ago

    Thanks Nancy … Magic X is cool method.

  • Richard De Beauvoir 3 years ago

    your face is so easy on my eyes . that I have an easy time understanding math! it’s a miracle, you are a miracle!

  • Diana Singh 3 years ago

    Need your help😭

  • Aamir Islam 3 years ago

    You are brilliant. I like your brain 🙂

  • Sufyman 905 3 years ago

    she look like violet from incredibles

  • Jonathan Luu 3 years ago

    Omg!! This was the most helpful video I found! Thank you so much!!

  • Acito Alexander 3 years ago

    bro this shxt is dumb like how do you even check ya answers you basically guessing

  • Megan Horvath 3 years ago

    Oh my gosh thank you so much. So helpful

  • ayepause 3 years ago

    i love you

  • Benjamin Guaragno 3 years ago

    Will you marry me?

  • pmoney8701 3 years ago

    @nancy are you single?😍😉

  • MESSIAH THE CHRIST 3 years ago

    Its like you make math more confusing watching it BACKWARDS in addition this short is no short cut its a dead in …. This is a horrible idea formula

  • El Buki 3 years ago

    Nancy I am *SO* thankful, I’ve been struggling with this so much, every explanation I saw/read before your video, either in text books or in other videos, was so confusing to me and this made it SO EASY. THANK YOUUUUUUU

  • dragonflyer11 3 years ago

    Great video! Thanks a lot!

  • Abdulrahman MB 3 years ago

    That was a lot of help

  • mr fleas 3 years ago

    It’s neat but it would be better to demystify the magic X so we’re thinking more like mathematicians rather than machines.

  • LolDarrellLol 3 years ago

    Thank you so so so much!!

  • muhammad ayaz 3 years ago

    Thank you so much .love you

  • Graciella Angela Nebres 3 years ago

    Your explanation is so seamless! Great job!

    • Oninab Resources 3 years ago

      Get more on solving quadratic equations from the link

  • Iainehskhem Mawlong 3 years ago

    Wonderful Nancy

  • Avinash Seedial 3 years ago

    The best explanation I have ever seen thanks so much

  • FUTURE 3 years ago

    Am i doing something wrong, I can’t get the right answer for 6x^2 +19x -7 =0

  • Leena Sankari 3 years ago

    Make space videos…. interesting

  • Hiewie 3 years ago

    This is so helpful

  • Christopher Knettel 3 years ago

    Got to say thank you for the tricks. My teacher had me crunching numbers to where I filled up a sheet of paper to solve it and even then I was lost lol

  • Andrea Lacher 3 years ago

    thank you! you’re wonderful!

  • Joseph Donovan 3 years ago

    If math be quadratics, give me excess of them! You have managed to banish all fear and loathing of quadratics in a mere 9 minute magical tour and with potent pulchritude to boot! Onwards to surds! Thank you!

  • Jushamole Jose 3 years ago

    Thank you soooooooooooooooooooo much.

  • Adidas Uzamaki 3 years ago

    What’s quadratics is it American because I’m in this is 🇬🇧

  • Ethan 3 years ago

    Damn girl, got yr own math and she

  • Abdullah OS. Silverman 3 years ago

    I can’t pickup anything from what you teach. Because I only look at you instead of focusing on math 😏

    • Ys1r 3 years ago


    • Abdullah OS. Silverman 3 years ago

      Ys1r I agree lol

  • Evan Wu 3 years ago

    What do you do if you end up with a whole number on the last part?

    • Ys1r 3 years ago

      I think it is….

      the whole number is the numerator(Top number)
      and 1 will be the denominator(Bottom number)

  • exo warrior 3 years ago

    Some times this method doesn’t work for example 2x²+7x−4

  • Jacob Zaid 3 years ago

    thank you so much i really didnt understand this at school but now i did

  • tyra myra matilda 3 years ago

    Lifesaver thank you!!!!

  • Juki Gladak 3 years ago

    Thanks so much Nancy, its easy and it helps me a lot.

  • Agent Anderson 3 years ago

    i like your x system , ty NPi

  • Jamal Google 3 years ago

    so no one gonna talk about how fucking beautiful she is?

  • Dylan M 3 years ago

    thank you for explaining the X method. And dividing the two terms on each side surprised me. But nonetheless, it seems to work

  • sas func 3 years ago

    Way cool.

  • Amy Margaret 3 years ago

    This doesn’t work for every quadratic

  • al-hazeem 3 years ago

    life saver

  • NukelerToonz 3 years ago

    I think she is writing backwards from her perspective

  • Pakhto Sandari 3 years ago

    Thank you so much !!

  • Orion time 3 years ago

    this lady is my guardian angel

  • Andrei Miga 3 years ago

    I always found it easier to solve the equation using the quadratic formula, and then the factoring is: a*(x-x1)*(x-x2)

  • travis rollins 3 years ago

    Thank you so much. I have watched several videos on factoring and this is the only one that has made any sense. Very organized and at the perfect pace!

  • Johnny Chan Thien Long 3 years ago


    Nancy, my name is John your super best friend

    Other comparaison of calcul, just for comment not critical

    I saw your video Magix X, So I calculated today at my side

    the roots equation second degree and the method Magic X

    My demonstration by your example

    3x²+10x-8 = 0

    Search classic Roots x1 x2 for delta > 0

    Delta = b²-4ac = 196
    Square of Delta = 14

    x1 = (-10-14)/6
    = -24/6

    x2 = (-10+14)/6
    = 4/6

    By inspiration Magic X from your example I see this transposition
    for the same denominator in relation with x1 and x2

    x1 = -24/6
    = -12/3 => Interpretation for Magic X

    x2 = 4/6
    = 2/3 => interpretation for Magic X


    (x-x1)(x-x2) = (x – -12/3)(x-2/3)
    = (x + 4)(x – 2/3)


    1) x² – 2x/3 + 4x – 8/3

    2) 3x² -2x + 12x = 8
    ———————- = —
    3 = 3

    3) 3x² + 10x – 8 = 0

    That’s mean Magic X is real ???

    PS: My english is francophone

  • BIGBOYGENGAR 3 years ago


  • VIKAS PANCHAL 3 years ago

    Wow you are so beautiful

  • B. Wright 3 years ago

    You are my hero. That is all.

  • google name 3 years ago

    these videos are great. I’m math retarded. You are teaching math. Why can’t math professors be bothered to do this? Math is for assholes but at least you bother to teach something. Thanks.

  • forever SHAMPOO 3 years ago

    I love you Nancy, I forgot how to do this thanks for the refresher, nice to see that beautiful face lol

  • Amity Swadling 3 years ago

    The only thing I’m thinking about for 9:14mins is how impressive your backward writing is

  • 1000 Subscribers Without Any Video Challenge 3 years ago

    ive never liked a vid so fast in my life

  • Zarif Baloch 3 years ago

    Its nice

  • Attaur Rahman 3 years ago

    Sixcy teacher

  • Predator MG 3 years ago

    This really saved my life:)
    rly thank you nancy!

  • Eman Ali 3 years ago

    Bless you finally understand this

  • blitzblutz 3 years ago

    Nancy, you are awesome! Your lessons are great and you make math so easy.

  • - GOD 3 years ago

    you’re weird and I like it

  • Brian Maggs 3 years ago

    Very helpful presentation.

  • heyitsja 124 3 years ago

    wait this won’t work on 2x^2 +3x-7 or maybe it dies and i’m dumb but

    • Lonely Wind 3 years ago

      Simplify it first by moving the 2 out. However, using the quadratic equation to solve for the roots eliminates trial and error. Though I had never seen the X method she described before that was neat. Always something to learn. Besides, I really like listening to her explanations.

  • Emmanuel 3 years ago

    Thx this video helped alot

  • Col 3 years ago

    Nancy…….what were you saying? I’ll have to watch this again. Thanks Nancy…. 🙂

  • Thiago Oliveira 3 years ago

    Anyone noticed that she is writing behind the whiteboard, backward and still has good handwriting?

  • Lucas Ordoñez 3 years ago


  • Tarun Baskaran 3 years ago

    when she is writing on the board she literally has to flip each and every number/letter to make it look normal to us.

    • Mint 3 years ago

      She probably mirrored the video so that it would be normal for us

  • lorenzo M 3 years ago

    How to skip school and learn math or anything else.
    USA High School grad rates (4years) are @ 50% and
    8th grade levels.

    If I had had these You Tube TA’s and tutors I would have been
    a rocket scientist or an engineer, computer programmer
    you name it. As it we’re I struggled through to
    Derivative and Integral calculus and used up too much TIME to do it.

  • Booty Nugget 3 years ago

    You just taught me more in 9 minutes than my teacher in 3 weeks

  • Theodore Sweger 3 years ago

    I like seeing the negative last number this means we will have a real answer, not imaginary. Unless the first number is negative.

  • Icequeen angel 3 years ago

    Thanks for your help Nancy♡♡♡♡♡♡

  • espn168 3 years ago

    that’s the lumberjack way.. do what the germans are taught. -b/2 +-Z search it on youtube.

  • Jennifer Puetz 3 years ago

    That was not helpful at all and you didn’t explain what you were doing

  • AHMEDثق TABET 3 years ago

    Thank you so much that helps me a lot

  • Sami Rahman 3 years ago

    Why would someone dislike this. I mean… you guys get how many students she saved from failing? Including me LOL

    • Vishnu Sudarshan 2 years ago

      yes ikr i was thinking that too lol

  • Dani Danielle 3 years ago

    Thank you so muchhhh! It helpeddd❣️

  • Rachid Haha 3 years ago


  • Thaij Johnson 3 years ago

    use dark colors for your math problem

  • Max.ed.19 3 years ago

    Amazing explanation, could you tell me what program do you use? I’d appreciate it.

  • silverbird58 3 years ago

    this would have been handy long ago

  • Zabarocky 3 years ago

    bro that x method is so short, only thing is im not sure if ill be given full marks for my method haha non the less great vid

  • Hiribel Monegro-Pina 3 years ago

    I’m literally jumping up and down like crazy because I finally understand factoring. Thank you so much Nancy ! You don’t know how us college students appreciate how delicate and simple you make math. Thank you ! I love youuuu omg

  • Augusta Yarteh 3 years ago

    Hi Nancy. X square. + 4 it is ( x+4) (x_ 3)= _12 which is x square then you foil your multiplication, which i call substitution to multiply each letters or numbers. Nice great explanation miss Nancy. Thanks a lot I can continue to do more calculations if you want me to solve for zero. There is more to do that particular problem. It all depends how you want me to work it out. I started my own differently. Which you end with my starting and your ending to that problem i will use it to solve for ……. Great video.

  • Sammo_3888 3 years ago

    The quadratic I’m trying to solve is 8x^2-10x+3, but using the magic X I’m getting (2x-3)(4x+1) which isn’t correct… left side of my magic X is -12, right side is 2. Dividing both by 8, I get -3/2 and 1/4. Please help! Where am I screwing up? Thx

  • TheFieryPotato 3 years ago


  • Aadharryan Senthilkumar 3 years ago


  • Mitesh Raja 3 years ago

    This is not fair! How can you concentrate with such a beautiful teacher writing away backwards with her marker! 😉

  • XxtrickyxX !!! 3 years ago

    sorry but your too slow and confused

  • Home School 3 years ago

    Well nancy! The method we have learnt from our Pakistani teachers is simple, quicker and effective. But student needs to be good in algebra and we asians are best in it.

  • JohnstasBACK 3 years ago

    For Question 6:44 She says that the numbers are 12 & -2 . Why aren’t the numbers -6 & 4? Please help.

  • Bella Tube 3 years ago

    omg i love you so much. God bless you

  • Antonio 3 years ago

    This is amazing. Thank you!

  • Tanishq L 3 years ago

    If you were my math teacher… I would top every exam to impress you😂

  • 100 subs without A single video 3 years ago

    Thanks you are the best in explaining!

  • Edu Edu 3 years ago

    Thank you so much!!!!!!!!!!!!! You finally helped me understand this..

  • Sherman Dedja 3 years ago

    Congratulations! Perfect and quite simple.
    Very original findings, mirrors (instead of a blackboard, if I understood it clearly).
    I followed him several times, the sweet voice and the accuracy in the explanation.
    Honestly perfect!

  • lasalleman 3 years ago

    Good lookin’ lady. In a witchy sort of a way. As you’d expect from a math prof.

  • Jemal M Yesuf 3 years ago

    that is genius!

  • Micah Glover 3 years ago

    She is good looking I would want her to be my teacher ; D

  • Adama camara 3 years ago

    thanks a lot but i used the magical X to solve 3x²-6x+3, i never got the answer until then, i used the other first method, can you pls tell me why?

  • warzz clan 3 years ago

    0:08 why she is screaming

  • Jonathan Zook 3 years ago

    Thank you so much for this tutorial. I’m helping my son (first-year in HS) with factoring polynomials, and it’s been decades since I last did these in Algebra class. I can now understand what he’s learning and help him figure out the problems.

  • Generator John 3 years ago

    This brings me back to my high school Algebra class. Never forgot the “foil” method we were taught when multiplying out quadratic equations. First, outer, inner, last.
    Nice tutorial. Thanks

  • Reboot Artist 3 years ago

    The video is nice, but no one can hear over the jazz music.

  • Rosa Nunez 3 years ago


  • Elijah Cortez 3 years ago

    💀im trying to “learn” and these comments are just “wow” 😂@jrc destreza

  • Elijah Cortez 3 years ago


  • Jo Santiago 3 years ago

    After such a long search a video I actually get. Bless you girl

  • salaa23 3 years ago

    I am looking for 3rd degree factorisation, but i stopped for you eyes

  • Elijah Cortez 3 years ago

    the X method is not working for 6x^2-11x+4

  • Ethan Simon 3 years ago

    Thank you so much, you explained it so wel!
    Keep up the great tutorials 🙂

  • Jonathan Richard Chai 3 years ago

    Anyone here trynna cram stuff in your brain before and online exam due to fucking corona

  • N D 3 years ago

    Hi nancy, Would you please help me to know the technologies (tools) you were using to video record and write on the air?
    I will be much appriciated

  • Alyssa Porter 3 years ago

    how would solve the problem if the number attatched to the x squared is a 1/2?

  • Bashir Abubakar 3 years ago


  • J J 3 years ago

    Thank you so much for all of your videos on precalc! Your god sent

  • Eye Toaster 3 years ago

    Thank you so much, I was going crazy trying to remember how to factor trig quadratics

  • Zinc Man 3 years ago

    Could you give an example where one would use factoring in a real world situation? I’ve used basic algebra concerning medication dosing but where would you use factoring? Thanks

  • RemunJ66 3 years ago

    Don’t you think factoring by the method of decomposition is more intuitive?

  • Sage Aries 3 years ago

    “You don’t have to like math, but you can like my videos”🤣🤣🤣

  • Toha Toha 3 years ago

    Can u solve this, shall I look at u while u r solving or your writings? solve it with proof.

  • Rachaelcyn 3 years ago

    thank you so much

  • Raj Aich 3 years ago

    Thanks for all your help😊

  • mute 3 years ago

    great video very helpful

  • liban mohamed 3 years ago

    Thanks for everything

  • LoamPlant 3 years ago

    CEO of writing backwards and it still look good

  • sam z 3 years ago

    i had to go back and rewatch because i was distracted at how she was able to write backwards 👀 that’s some skill!

  • poseidon - 3 years ago

    Online school sucks major ass, this helps so much

  • olivia w 3 years ago

    thank you for this! it really helped

  • Masha Warnken 3 years ago

    To everyone who thinks she writes backwards,

    Yes there is a possibility that this is the case, however if you look at her hand she is writing with her left hand, and lefties are pretty rare. I think what she does is flips the video around. Basically in videostar and other video editing apps you have the option to reverse the image preview of the video to show it the other way. Basically what i’m saying is, yes there is a possibility that she is writing backwards, but it is more likely that she flipped the video.


  • Luis Marin 3 years ago


  • Light Okeke 3 years ago

    The magic x method doesn’t work for all

    • Miaow 3 years ago
  • Rahim Nazari Math Academy 3 years ago

    Excellent contents, sub to my channel to be youtube friends

  • tasha vanhuss 3 years ago

    did anyone notice that she was writing backwards

  • Simaima Pohahau 3 years ago

    I’m a sophomore in high school and have been struggling with factoring. This method really is magic because it’s so easy!!

  • Ajayy Mc 3 years ago

    she is so beautiful

  • G. V. 3 years ago

    I liked your quicker, faster method! However, it got bogged down with:
    12x^2+67x-275. Is there a way to streamline this further? Thanks.

    Ευρηκα! I’ve discovered that if “a x c” in ax^2 + bx + c is too large, like the 275 here, look for factors of “a” first. So here, write
    (12x + ***)(x – ***)
    (6x + ***)(2x – ***)
    (4x + ***)(3x – ***)

    There are only 6 trials total, and you will reach (4x -11)(3x + 25). This is far fewer than listing the factors of 3300 which the magic “X” requires for this case. The magic “X” works best for small values of a x c. The “factoring of a” method works best when the a x c number gets out of hand. Ultimately what you want is a minimum of trials. —“I stayed up all night studying factoring and finally it dawned on me!”🤓

  • Mister ListerField 3 years ago

    Thankyou Nancy

  • Miaow 3 years ago

    The magic method is too complicated. In fact, anything that involves fractions is only gonna complicate things to students who are slow in understanding math.

    I suggest watching The Organic Chemistry Tutor’s method

  • luke schmidt 3 years ago

    Who else dead ass hate math?

  • Julianne Wintz 3 years ago

    Thank you my teacher doesn’t know how to teach, so thank you once again.

    • Caroline 3 years ago

      same! my teacher talks about her daughters leggings…and then the bell rings and i fail the test

  • Goopal G 3 years ago

    Enjoyed very much after many years later , it because quadratic Algebra was my very favorite and fun making enjoyable topics.

  • Kannee Mobley 3 years ago

    I hate algebra…but i love you nanci pi

    • Caroline 3 years ago


  • Syeda Salufa 3 years ago

    Thanks for teaching me factorisatio in an easy way

  • Shah Rana 3 years ago

    She Is so sweet.God Bless You Apu.

  • Songmin Yoon 3 years ago

    Good explanation 🙂

  • Wolfgang Amadeus Mozart 3 years ago

    Nancy looks so depressed doing math

    • Josh Oca 2 years ago

      We all are

  • Hemlata Sharma 3 years ago

    She have got damn sexy voice

  • maheen asad 3 years ago


  • Nageena Sharma Sharma 3 years ago


  • xosantany 3 years ago

    baddest math teacher😍😭

  • Emory Carter 3 years ago

    you’re sooo pretty btw

  • Newday Cinematics 3 years ago

    thanks a lot

  • Sassa Frass 3 years ago


  • Edd G. 3 years ago

    *mind blown emoji goes here*

  • Salma Mohammad 3 years ago

    Thanks very helpful

  • Ogle Noelle 3 years ago

    Anyone in quarantine while watching this??

  • Koker 336 3 years ago

    I wanna cry you saved my life😭😭😭

  • paulsmith maths 3 years ago

    very nice, you’re my inspiration to help my students and create my own channel. We can all spread the love of maths

  • Raffy Mendoza 3 years ago

    Nice one, writing backwards. Your gifted 🙂

  • Jon S 3 years ago

    just realized she was drawing backwards o_o

  • Life with Joy rjeili 3 years ago

    God bless youu !! You saved mee

  • Maeed Abdul 3 years ago

    Realy i understood very nice lecture i am from pakistan

  • THE TUTOR 3 years ago

    woow beauty and love math, she’s rare women

  • Rachel Sanyu 3 years ago

    Am i the only one who notices how she even writes backwards??

  • Junk Emails 3 years ago

    Have you trained write backwards or you already had this ability before? Crazy and cool 😆

  • HamC 3 years ago

    Like if you agree

  • Giani Cowo 3 years ago

    really helped! I really appreciate it!!!!!

  • Dr. jey 3 years ago

    Can you solve hard question, these are easy questions

  • khalid kasab 3 years ago

    Respected madam, your method is so good. How to send questions to you for solution? Is there any source like WhatsApp or any other?

  • Product Dezign 3 years ago

    Nancy….I dont want to be picky.. but your x variables look like a MULTIPLY sign..this could confuse students….unless thats USA standard??

    • Daytona Moscow 2 years ago

      You put a dot or leave it blank when its multiplication. “X” symbol is only really used in calculators.

  • xyzpdq102 3 years ago

    I like this better than the box method. Those of you watching, do you like this better as well?

  • Ethan Christopher 3 years ago

    How is her backwards handwriting better than mine forwards😭

  • Paul Brener 3 years ago

    Very good video, with the best technic (the super X one), Very good before a test

  • Beax 3 years ago

    This is genius wtf

  • Felipe Goncalves 3 years ago

    Hello, teacher! I’m from Brazil, I is studing english and like math.
    I’m learn english!

  • Ayush Kumar 3 years ago

    Waho mam thanks for your help

  • tae tae 3 years ago

    Thank you Nancypi 😀

  • Avery Woodlief 3 years ago

    Thank you so much for all the math help, Nancy!

  • Anish Das 3 years ago

    what if the quadritic equation is biger than just 3 terms, let’s say it is 10 terms, this trick still works, it’s not that logical, even sal from khan academy did the same thing

  • Patrick Barry 3 years ago

    Thank you so much

  • Tharmarasan Kandiah 3 years ago

    3x *x +12x -2x +8
    3x(x+4) -2(x+4)

  • Lynn Coetzee 3 years ago

    yoour video was very helpful

  • Housseine Ait Berhi 3 years ago

    Thank you

  • A Gamer 3 years ago

    Who came here from a math teacher

  • Belén Jurado 3 years ago

    this video is very helpful. But the moment she started writing on my screen I was in awe. LMAO DIDNT EXPECT THAT TO HAPPEN HAHA

  • Patrick Barry 3 years ago

    Great video ❤️

  • Katie Paige 3 years ago

    I love you Nancy Pi! You are my idol!

  • Harry Vlogs and More 3 years ago

    Thank you so much! This was amazing

  • Victoria Potts 3 years ago

    why this no work for me??

  • Advanced Slay3r 3 years ago

    My friend won’t give me a high five I told him I’m gonna send you after him. Can you fly down to Pennsylvania and teach him his lesson

  • Imene 3 years ago

    Fav teacher omg thank you

  • Krypton 114 3 years ago

    The magic x method is pretty cool. Gonna try it. Thanks this video was really helpful.

  • Kartikeya Sawarkar 3 years ago

    u gotta flip the signs in the brackets kiddo or else wrong answer. study a bit eh….

  • Undecided Cinema 3 years ago

    marry me

    • Josh Oca 2 years ago

      Hol up

  • Taylor Haworth 3 years ago

    THANK YOU. This is such an easy method

  • Mathematics MS Simplex 3 years ago

    I like the way you explained how to factorise

  • Cinema74 2 years ago

    Magic X

  • Crystal 2 years ago

    This has saved my life! Thank you soooo much!

  • Ollie Crabtree 2 years ago

    When did you realise she was writing backwards.

  • FanTheFrog 2 years ago

    Oh no a attractive female, never had a math teacher like that

  • paco.medic 2 years ago

    Extremely helpful, thank you!

  • gamersgo 2 years ago

    This method saved my life

  • Krypton 114 2 years ago

    U are a frickin genius with that X method. I was stuck and u helped me big time.

  • Krypton 114 2 years ago

    Nancy what do i do if the middle number is a prime number like 13

  • Rainsong 777 2 years ago

    05:36 – 05:57 = #mindblowingmathtrick #KikiTrick777

  • Wonderful Aircraft 2 years ago

    Thank you SO much for the magic x method. It makes factoring so so much easier for me. No idea why it’s not a more widely used technique.

  • Sivatharmeni Sivatharmeni 2 years ago

    That’s good & Thank you.

  • Just My Fro & I 2 years ago

    The fact she writing backwards blows me

  • Lorence Ramoso 2 years ago

    How did you get 4/1? I need help. huhu

  • Melchor Hipona 2 years ago

    forgot everythinh but i am inspire to learn because of you nancy i am 29 years old now here is my email nancy i want to comunicate with you melchorvenus3412@gmail.com

  • Sameera Hinton 2 years ago

    Glad I found you, you speak slowly it’s easier to follow ☺️

  • Cian Mac Coisteala 2 years ago

    You’re a saint! Thank you so much

  • Alora Rojas 2 years ago

    Mind blown! Thank you!

  • Vishal Meena 2 years ago

    I’m gonna like this because of her amazing skill to right backward and then explain at the same time.

  • Jeffrey Deez 2 years ago

    Thank you Nancy! First time seeing your vid and not only are you amazing at explaining things, I am freaking out with your inverted writing with your left hand! 😲🤘🏼🔥

  • Ali Yousef 2 years ago

    godess of mathematical shit <3

  • samuraimak86 2 years ago

    The real question is why?

  • Ali Yousef 2 years ago

    Bob Ross of math

  • Ali Yousef 2 years ago

    oh shit I commented before

  • Richard Richards 2 years ago

    This is an absolutely brilliant tutorial, I could never understand factoring, i had often heard certain people have a natural ability to teach and this just proved it, thank you so much.

  • Tu-Quyen Truong 2 years ago

    thankyou so much! this was definitely helpful! I am looking forward to using more of your videos!❤️

  • Watum Njangu 2 years ago

    Thank you so much. This was actually very helpful. My question goes on the last example.
    How do ypu care for where to put negative and positive signs?

  • Scott C 2 years ago

    is she writing inverted on the glass?

  • Innomama Dickson 2 years ago

    i’m scared…is she writing backwards??

    • Innomama Dickson 2 years ago

      lol BTW THANKSS

  • Amr Foozi 2 years ago

    Mate. This woman is 10x better than my teacher. My maths teacher rn is sooooooo bad. You might not believe it, but some indian teachers don’t teach maths that well. Thanks NancyPi for teaching me actual stuff without me getting rising blood pressure nor chronic hypertension from just looking at x’s the whole time.

  • Mike 1611 2 years ago

    love u nancy!

  • Omer Imran 2 years ago

    You divided with the 1st coefficient i.e. 3 will this rule be applied on any random # or only for 3 ?

  • Gerardo Rene Llusco Torrez 2 years ago

    Very good tocher

  • Anish Das 2 years ago

    who ever found this method must have gone through extreme yoga to be that aitient to finding this formula

  • MrSinstarr 2 years ago

    I could watch her do math all day how did i end up here

  • omprasad omprasad 2 years ago

    thanks mamm

  • Lilian Kitosy 2 years ago

    Thx nancy

  • Sarah Bear 2 years ago

    I think you just saved my life.

  • bezawit mundino 2 years ago

    hi nancy how are you I am one of your students and I am from high school? please can you give us some questions with answer?

  • Dav1d_03 2 years ago

    this did not work for x^2+6x+9

  • Samurai 2 years ago

    thanks alot i have a huge test tommorow

  • Victoria Castro 2 years ago

    Who is watching this during quarantine cause of online school

    • Gymnastics Life 2 years ago

      Well it’s more so I can be ahead in highschool

  • MLB_ Loggers 2 years ago

    Anyone else wonder how shes writing backwards?

  • Lalit Dhingra 2 years ago

    Great explanation. My kids are going to love this. How do you manage to write behind the glass?

  • silver stonemanor 2 years ago

    I know you’re never going to see this but you have saved my life

  • dan zhang 2 years ago

    No wonder she is so smart, she is left handed

  • Anno 2 years ago

    your a life saver

  • Watchmakersp99 % 2 years ago

    Thank you Nancy…a great help!

  • Lubdhak Das W 2 years ago

    received a pdf on quadrics

  • living mech champ 2 years ago

    Thanks for explaining

  • living mech champ 2 years ago

    My teacher did not know how to explain it

  • mathew thomas 2 years ago

    Leonardo Da Vinci be proud of her backward writing skills

  • mumu anime 2 years ago

    still kinda confused because i still can’t find the answer to 6x^2 + 13x – 5, or at least i found the answer but the X method doesn’t work

  • MMA Mongow 2 years ago

    For tour last snswer of factoring instead TO make graph Who dont.you divide bye 2 in the Middle where there IS 10

  • Zhaedi Pitt 2 years ago

    I’m having trouble with the signs but how did she factorize 3(x² + 4x – 12) and get (x-2) (x+6) i dont understand how she got the 2 and how the signs switched

  • Mohamed Faisal 2 years ago

    there are no short cuts to mathematics do it the way it is

  • Mohamed Faisal 2 years ago

    we do not allow short cuts there

  • Lucky Ahmed 2 years ago

    Mem you written laft hand

  • Elle Goddard 2 years ago

    This is so helpful

  • Howling Media 2 years ago

    Is that the same as s trinomial ?

  • MathsDr Educational 2 years ago

    I like your video

  • Aryan Mohindra 2 years ago

    This helped me so much. Thanks

  • Harry Brown 2 years ago

    Do u have Venmo?

  • Lakshan Bandara 2 years ago

    Believe guys this method is working

  • Miles Kelleher 2 years ago

    Thank you, I’ve been trying so hard to understand this. Thank you for your help👌😭👌

  • Esther Oh 2 years ago


  • Dionysios 2 years ago

    The X method sucks

Comments are closed.