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Published on May 15, 2018 by

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.

2) IF YOUR QUADRATIC STARTS WITH 2X^2 OR 3X^2 OR 4X^2, ETC:
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 more of my math videos, check out: http://nancypi.com

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

• nice to see you nancy

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

• 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

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

• you saved my ass with this

• BAE

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

• please put short trick for 3 & 4 degree polynomial factoring

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

• pewdiepie does so he must be great at teaching math

• @overlord6644 XD

• @overlord6644 but t series has more

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

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

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

• 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)

• Awesome understanding!!!!Thanks Nancy

• ur so good at teaching ily

• Nancy, has math always come easy to you?

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

• Thanks Nancy. Clear and well explained.

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

• thank u nancy now I can pass my exams

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

• How else u factored those??

• Your voice is softer than Downy Liquid Fabric Softener

• damn creep

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

• SIIIIIMMMMMPP

• excuse me what

• Green Right Hand what the hell

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

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

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

• i was also thinking of that while she was explaining

• Thank you so much Nancy, You are smart

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

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

• 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.

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

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

• TENGS MBAKNYA

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

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

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

• Thanks

• how do you write backwards ?

• 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.

• What if she really “IS” writing backwards?

• It is mirrored or flip

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

• @Stephen Dumore umm… i left han…ded

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

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

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

• and she poppin

• 10/10 would wank again

• Same

• you cant have 1x when x already means 1

• can anyone explain how she writes backwords?

• By hands

• the video is mirrored lmfao

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

• THANK YOU SO MUCH

• Hii smarty teacher

• Nancy you are great

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

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

• 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 ;-;

• @Q QLOKE omg samee they r both good

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

• You are phenomenal,girl. God bless you big time

• Thank u omg

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

• 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

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

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

• What about =0 ,at the last quation

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

• or you would purposely fail the class 10 times.

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

• wow i understand it better than ever,. thxx

• 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.

• Thank you

• Which country u belongs??

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

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

• If i was there id be making sht like

• Thanks the gods for your explanation

• Thanks very much I learnt a lot.

• COOL

• can u be my wife? I ACTUALLY GET THIS

• @Innoxent Boi lol

• anyone else cramming this in before a test

• Nope just watching for fun…

yes of course who isn’t lmao

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

• Literally me rn 😭

• Yes mate…Just B4 the exam…😂😂

• Doing it in the middle of a test ✌️

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

• Brandon Ochoa you fool write the fraction over 1 then

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

• Maybe use trial n error?

• I honestly hate trial n error bro.

• Wish she was my teacher

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

• 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

sq=squared

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

• WOWWWW!!!!!!

• 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

• Then it cannot be factored further.

• Just make sure you double check.

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

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

• Thank you so much!! Your video saved me!

• This x method is amazing!!!!

• Life saver

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

• 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.

• Some teachers just shet lol

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

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

• 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).

• I like you.nice tricks.

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

• god bless your soul! 🙂

• I finally understand how to factor Yay!

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

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

• hey cutie

• get off my christian server

• Good on ya Nancy! You are a great teacher!

• Thank you Nancy!

• oof

• great video. Helps a lot

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

• That magic x is 🔥🔥🔥

• Wait.. is she writing backwards ?

• Holly cow….she is writing backward

• Thanks

• 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!!

• This was amazing!

• Nancy pls be my wife

• Watching this before finals….

• Gud luck

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

• lol same

• @Lucho Vargas lmaoo

• @Lucho Vargas lmfao!

• The GOAT! Thank you, Nancy!

• thank you sooo much for this video!

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

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

• 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

• @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.

• 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

• 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.

• 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.

• That’s where true mathematical love exists !

• 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

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

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

• Thank you beautiful teacher

• 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!!!!!!!

• 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.

• Nancy Pi LoL I like it .

• Math

• 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

• Thank you teacher & happy new year!

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

• I STILL DONT GET IT:(((((

• HI
NancyPi, absolutely fantastic and you are a great teacher.

• 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…

• Nice…. Fantastic..

• Hii nancy

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

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

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

• is there anything else you can teach me ?

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

• 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.

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

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

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

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

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

• Very informative, thank you very much.

• ;-; 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!

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

• Did you call the AC method the X magic thingy?

• im hot for teacher

• wow i love this method

• u should be a model]

• True bich

• 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!

• 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.

• 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?

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

• 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! 🙂

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

• Amazing video. Very understandable. Thank you!!!

• I gotta learn this in a hurry!

• Hi nancy

• Mr.jimenez girl

• You are a great teacher

• Thanks for the maths help

• I love you

• Can you tutor me

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

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

• even in Arkansas USA it was 7th grade.

• How do u frikin write backwardm/

• Brilliant

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

• 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…

• The MOST GORGEOUS math teacher of ALL TIME.

• Totally agree.

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

• @polly10022 even if it’s a compliment

• Nani

• @polly10022 stop scolding heteros, asshole

• 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?

• 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.

• 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

• 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 😀

• Extremely helpful, thank you .

• 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.

• thanks for the help

• Thanks for ur tip…. It’s very useful

• are you a math teacher?

• bro she smart and good looking

• Unfortunately NOT allowed in collage courses…

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

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

• @main mast did you just assume my home planet?

• 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.

• 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

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

• Her ability to write backwards is amazing.

• bro she is so bad hot damn

• HOLD ON SHES WRITTING BACKWARDS!!! WHAT!?

• YOU ARE MY TEACHER I LOVE U

• my teacher calls the magic x the xbox method

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

• Who’s watching in 642.668 * pi?

• Suddenly I’m wayyyyyy more into math:)

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

• l like u mam
you very beautiful

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

• I’m still confused as to how she writes backwards

• This was fantastic, thanks for this video!

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

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

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

• Always good Nancy

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

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

• 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.

• 5x^2+9x-14.

Doesn’t work?

• 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). 🙂

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

• P6o.

• Thank you very much

• this lady is a master at writing backwards

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

• you are awesome cutieee

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

• Yous a cutie

• 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!

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

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

• Your a ABSOLUTE GENUS !!!

• Thank you this helps so much!

• Thank you

• Hotter than my math teacher

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

• 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)

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

• is she writing backwards???

• is she writing BACKWARDS???

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

• How do you write backwards

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

• She mirrors the video

• Nancy pls bring back the kids

• You too??? I’m trying to tell Karen

• @Lucho Vargas you know her too?…

• Thank you!

• thanks. now i get it

• you are my savior

• Intelligently beautiful ⚘⚘⚘

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

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

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

• THANK YOU

• What’s up Pongracz

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

• This video is cool

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

• Great video!

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

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

• thank you so much this helped me a ton!!

• what if they all have x in it

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

• 5:19 damn she sings

• Steve Laber
LMAO

• 👌🏻

• 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.

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

• Yet the eternal question remains :

But …. But why ?

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

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

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

• 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……

• does the magic X really work for ANY factoring quad?

• Not if the last number isn’t a constant

• no it doesnt

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

• @abdullah sultanits okay

• Mojosoyo – yare yare daze

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

• On what are you writing

• 😍😍😍

• 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.

• really helped,thank you😊

• Factoring
X^4+2x^3-x^2-6x-3=0

• Thank you’re the best

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

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

• 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

• *I V E A S C E N D E D*

• 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.

• 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.

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

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

• I love it.

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

• Thank you very much

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

• @forexhack boi……….

• the magic X is Excellent

• *WHO ELSE KNOWS THAT MAGIC X METHOD IS ACTUALLY “SPLITTING THE MIDDLE TERM ALGORITHM”*

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

• @Jeff Gaffen OMG CAN WE TALK I REALLY WANNNA KNOW ABOUT MATHS AND METHODS FROM OTHER COUNTRIES

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

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

• Richard Romero bruh you like -6

• Good job, Nancy! Very simple!

• 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!

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

• 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!!!

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

• Angrej kumar

• 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

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

• THank you , Nancy,this is so helpful.

• Thanks.

• Boutta take a quiz

• Thanks

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

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

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

• 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)

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

• I hang on every word you say NancyPi.

• Otima aula

• 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

• thanks this helped a lot

• Very informative video thank you

• What if you end up with two positive numbers

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

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

• I would watch her drying her hair even 😁.

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

• 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.

• I am so grateful to you.

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

• 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.

• She so beautiful

• I really appreciate this video Nancy. Thank you

• OMG man not all heroes wear capes

• 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.

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

• thank you you magic woman for the magic X

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

• Beauty & brains !

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

• Too much boaring

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

• 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

• you’re the original mathbff?

• 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.

• You’re fantastic. Thank you

• wife material kek

• 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.

• You are the best teacher Ma’am

• Great teacher

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

• THANKYOU SO MUCH, I HAVE A TEST TOMORROW, AND I COMPLETELY FORGOT HOW TO DO QUADRATICS!!! TYYYY

• You’re still teaching me even out of school lol

• Omg u so amazing 😉
Thanks so much ❤️❤️

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

• Gorgeous

• Thank you Nancy this way is awesome

• 🤦🏻‍♀️

• 4:17 what would u do if they were prime

• tuff question my frd

• The magic X really helps a lot..thank you

• 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.

• You really helped me thank you

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

• I wish you were my teacher 😉

• 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.

• thanks that X magic method is really helpful

• Thank you so much helped me with exam

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

• Wow!!!!

• THANK YOU I LOVE YOU

• Thank you so much for helping me!

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

• 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.

• 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…

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

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

• @Warc Arden yep most likely

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

• Very helpful. Loved the Tutorial

• This is only one that im struggling with.

• Question!!
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:
48x^2+14x+1

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

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

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

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

• that was epic lmfao

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

• 🙁

• @BOMBON187 lol haha

• Please tell that to our math teachers.

• I love you

• Beautiful Math😍😍😍

• Nancy Pi=3.14

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

• thankyou very much for this method.

• Wow you explain so well nowni understand how

• 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:

• Subtitles are in the way.

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

• 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

• Thanks for the lectures.

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

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

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

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

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

• Lol

• 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.

• Thank you!

• شكرا شرح جيد

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

• I would buy you stuff

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

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

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

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

• How the hell did she learn to write in inverse

• I went to kcuf u

• That magic x stuff dont work when you have big numbers

• OMG GOD BLESS UR SOUL

• Well done,thank you, good vidio

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

• Janus ismail weird ass

• Bender met calculon in a bar.
🤪🤪

• wow

• Thank you Nancy.. It’s our pleasure

• Hi.

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

• Youre pritty :)……. Awesome

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

• why 3x^2+9x+6 does not work with the x method?
can some one explain this?

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

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

• it helps me a lot

• Thanks a lot! you’re an angel.

• Nice

• That was just awesome – thank you

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

• *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*

• Omg thankyou💯 i will take my exam this afternoon lmao

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

• Meh maybe later

• Going fishing, huh?

• @Nint lol ikr

• I’m not going to admit to it

• another success for jeremiah’s fishing business

• Please do how to factor Cubic Equations.

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

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

• Danny L lol

• Many thanks.

• (2x-3)(2x+1)

• Best explanation I ever found on youtube. Love you Nancy

• 🔥🔥🔥🔥🔥

• 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.

• This was so helpful!! Thank you!!

• Thanx!

• i want you to be in my school TBH

• 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?

• I love you

• Wat r u writing on?

• 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.

• 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.

• Girl BLESS you

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

• next video: u backwards write

• Don’t worry, I have a way!

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

• 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?

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

• I know easier method than this

• @Home School share

• Zara Evelyn innit I need to know

• Thank-you very much, you are a Godsend!

• Did you have to learn how to write backwards?

• Omg thank u so much. I finally get it

• heyimbee if she was actually good at math

• omg thank u so much this was so helpful

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

• 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.👊

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

• 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

• did not understand the magic X

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

• This helped. Thanks

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

• shes so good at writing backwards lol

• Thank you

• 😮 wow 😮!!! Thank u!

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

• Got an exam next week. Help!

• 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 …

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

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

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

• 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.

• Excellent, thanks Nancy

• This was awesome! Thank you!

• 2 questions
first: whats with the unnecessary cuts?
second…:

*did she just write in air?*

• FrighteningFPS she writes on a clear board which is mirrored

• MAGIC X SAVED ME THANKK YOU SOO MUCCHHHHHH

• Thank you Nancy!

• That’s really a great video… thanks

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

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

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

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

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

• @RJ Segedin tell that to my trig professor.

• 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

• i can’t seem to factor this by using the said method does anyone know why?
6x^2+10x-24

• 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!

• @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

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

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

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

• This is actually really useful, thanks NancyPi!

• 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

• You saved my life!!! THANKS!

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

• It’s good to see you again

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

• thank you you made my life easier

• COME TO MY ARMS YOU WONDERFUL WOMAN!

• 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

• hi nancy u are god

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

• Wow, amazing job

• OMGG <333
ur so good

• This was so useful wth

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

• a clear board

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

• Thank You ! this video was so helpful

• THANK YOU FOR REAL

• It says it’s wrong ;-;

• 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…

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

• 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

• well explained video ngl

• thank you love you so much

• im so tired im falling asleep.

• Sooo how about when I have 4 terms?

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

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

• WTF

• can I marry you

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

• THANKS FOR SAVING MY LIFE

• How to do 5b^2-35+50

• Thank you for this video it was very helpful 👏🏽

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

• thank you

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

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

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

• Thank you sooo much

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

• wow, thanks

• Thank you, It clicked before the 4 minute mark.

• who else has cpm math and isn’t learning anything

• Thank you
Great

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

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

• me

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

• 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!

• My Love !

• You explained it soo much easier than my Algebra teacher

• You are super attractive <3

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

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

• nancy so fine

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

• 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.

• I need to marry you so I can learn math.

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

• do we need to simplify it???

• I like that trick.

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

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

• wow
she was literally writing backwards perfectly

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

• 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.

• Nancy,我是华人，我是你的粉丝。你好厉害。可以倒着、反着写字！很佩服！

• that was so helpful thank you so much

• Holy shit thank you

• 7:32 XD

• t h a n k y o u 😔

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

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

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

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

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

• U r my favourite

• It doesn’t work

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

• Thank you so much

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

• this is why math will never be easy

• 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!

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

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

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

• Ok this is a neat way to show factoring

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

• omg thanks for this its so helpful!

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

• she needs to give more detail

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

• Thank you so much !

• Thanks

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

• Thank You!!

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

• That expression is not possible to factor

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

• OMG I LOVE YOU SO MUCH BEAUTIFUL ❤️❤️❤️

• what if there’s no c??

• she looks like shes being forced to film this video

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

• WHAT OF YPU CANT DOVIDE IT BY THE LEADING COEFFICIENT I JAVE A QUIZ TMRW AND I DONT WANNA WASTE MY TIME DOING GUESS AND CHECK

• 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!! 🙂

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

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

• Whats 3x + 2 – 2xsquared

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

• THank you, Nancy. this was most helpful.

• Hello iam Razu from Bangladesh

• 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.

• 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.

• Thank you much! This helped!

• Thank you…. 谢谢你

• Pffffttt

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

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

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

• upon retrospect I’ve realized the video is flipped

• 7/10 would math

• Perfect..

• Had to watch again, still amazingly useful.

• can I go to the bathroom, please

• Thanks for saving my life once again 🥺

• how tf she writing backwards

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

• Can i factor both the coeffecient and the x?

• why dont you try it yourself? 😉

• Fuck I had to sub 🤩

• Thanks from India Pune

• 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!

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

• Thanks for the Magic X, its helped me tremendously!

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

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

• this was very useful thank you

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

• That problem isn’t possible to factor.

• Thanks

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

• Where r u from Nancy?

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

• The most helpful maths teacher of all time😍

• 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.

• I love you nancy

• 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.

• 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…

• 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.

• 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 👍

• Very helpful better than my math teacher

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

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

• nancy you’re hot

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

• 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??

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

• 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!!!

• Thanks Nancy … Magic X is cool method.

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

• You are brilliant. I like your brain 🙂

• she look like violet from incredibles

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

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

• Oh my gosh thank you so much. So helpful

• i love you

• Will you marry me?

• @nancy are you single?😍😉

• 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

• 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

• Great video! Thanks a lot!

• That was a lot of help

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

• Thank you so so so much!!

• Thank you so much .love you

• Your explanation is so seamless! Great job!

• Wonderful Nancy

• The best explanation I have ever seen thanks so much

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

• Make space videos…. interesting

• 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

• thank you! you’re wonderful!

• 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!

• Thank you soooooooooooooooooooo much.

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

• Damn girl, got yr own math and she
Thx

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

• 0_0

• Ys1r I agree lol

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

• I think it is….

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

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

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

• Lifesaver thank you!!!!

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

• i like your x system , ty NPi

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

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

• Way cool.

• This doesn’t work for every quadratic

• life saver

• I think she is writing backwards from her perspective

• Thank you so much !!

• this lady is my guardian angel

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

• 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!

• Hi,

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

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

Result

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

Verification

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

• THANK YOU SOOOOO MUCH!! IT TOOK MY MATH TEACHER A WEEK TO EXPLAIN THIS AND HE SUCKS ASS CUZ I DIDNT GET IT, THANK U SOOOO MUCH THANKS TO U IM GONNA DO GOOD ON MY MATH TEST!!!!!!!!!!!!!!!!! and btw you are hot

• Wow you are so beautiful

• You are my hero. That is all.

• 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.

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

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

• ive never liked a vid so fast in my life

• Its nice

• Sixcy teacher

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

• Bless you finally understand this

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

• you’re weird and I like it

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

• 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.

• Thx this video helped alot

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

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

• tnkx

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

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

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

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.

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

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

• Thanks for your help Nancy♡♡♡♡♡♡

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

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

• Thank you so much that helps me a lot

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

• yes ikr i was thinking that too lol

• Thank you so muchhhh! It helpeddd❣️

• Perfect

• use dark colors for your math problem

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

• this would have been handy long 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

• 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

• 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.

• 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

• ty

• .

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

• sorry but your too slow and confused

• 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.

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

• omg i love you so much. God bless you

• This is amazing. Thank you!

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

• Thanks you are the best in explaining!

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

• 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!

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

• that is genius!

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

• 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?

• 0:08 why she is screaming

• 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.

• 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

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

• Thankyou!

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

• @jrcdestreza

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

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

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

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

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

• 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

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

• Nice

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

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

• 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

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

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

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

• thank you so much

• Thanks for all your help😊

• Thanks for everything

• CEO of writing backwards and it still look good

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

• Online school sucks major ass, this helps so much

• thank you for this! it really helped

• 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.

Thanks!

• nerds

• The magic x method doesn’t work for all

• Excellent contents, sub to my channel to be youtube friends

• did anyone notice that she was writing backwards

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

• she is so beautiful

• 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!”🤓

• Thankyou Nancy

• 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

• Who else dead ass hate math?

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

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

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

• I hate algebra…but i love you nanci pi

• same

• Thanks for teaching me factorisatio in an easy way

• She Is so sweet.God Bless You Apu.

• Good explanation 🙂

• Nancy looks so depressed doing math

• We all are

• She have got damn sexy voice

• thanks

• Excellent

• you’re sooo pretty btw

• thanks a lot

• YOU’RE AMAZING THANK YOU!!!

• *mind blown emoji goes here*

• Anyone in quarantine while watching this??

• I wanna cry you saved my life😭😭😭

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

• just realized she was drawing backwards o_o

• God bless youu !! You saved mee

• Realy i understood very nice lecture i am from pakistan

• woow beauty and love math, she’s rare women

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

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

• Like if you agree

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

• Can you solve hard question, these are easy questions

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

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

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

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

• How is her backwards handwriting better than mine forwards😭

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

• This is genius wtf

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

• Waho mam thanks for your help

• Thank you Nancypi 😀

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

• 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

• Thank you so much

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

• yoour video was very helpful

• Thank you

• Who came here from a math teacher

• 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

• Great video ❤️

• I love you Nancy Pi! You are my idol!

• Thank you so much! This was amazing

• why this no work for me??

• 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

• Fav teacher omg thank you

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

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

• marry me

• Hol up

• THANK YOU. This is such an easy method

• I like the way you explained how to factorise

• Magic X

• This has saved my life! Thank you soooo much!

• When did you realise she was writing backwards.

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

• This method saved my life

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

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

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

• 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.

• That’s good & Thank you.

• The fact she writing backwards blows me

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

• i
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

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

• You’re a saint! Thank you so much

• Mind blown! Thank you!

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

• 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! 😲🤘🏼🔥

• godess of mathematical shit <3

• The real question is why?

• Bob Ross of math

• oh shit I commented before

• 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.

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

• 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?

• is she writing inverted on the glass?

• i’m scared…is she writing backwards??

• lol BTW THANKSS

• 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.

• love u nancy!

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

• Very good tocher

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

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

• thanks mamm

• Thx nancy

• I think you just saved my life.

• 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?

• this did not work for x^2+6x+9

• thanks alot i have a huge test tommorow
thankss

• Who is watching this during quarantine cause of online school

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

• Anyone else wonder how shes writing backwards?

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

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

• No wonder she is so smart, she is left handed

• Thank you Nancy…a great help!

• Thanks for explaining

• My teacher did not know how to explain it

• Leonardo Da Vinci be proud of her backward writing skills

• 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

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

• 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

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

• we do not allow short cuts there

• Mem you written laft hand

• Is that the same as s trinomial ?

• This helped me so much. Thanks

• Do u have Venmo?

• Believe guys this method is working

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

• CAN YOU PLEASE TEACH ME TRANSFORMATION OF FUNCTIONS !!!

• The X method sucks