How to Solve By Completing the Square (NancyPi)

Published on August 28, 2018 by

MIT grad shows the easiest way to complete the square to solve a quadratic equation. To skip ahead: 1) for a quadratic that STARTS WITH X^2, skip to time 1:42. 2) For a quadratic that STARTS WITH 2X^2, 3X^2, etc., skip to time 6:46. 3) For NEGATIVE leading term like -X^2, skip to 13:34. 4) If there's NO X TERM (ex. 3x^2 - 121 = 0), then you cannot complete the square and can solve directly - skip to 16:30. Nancy formerly of MathBFF explains the steps.

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How to complete the square when solving quadratic equations:

Completing the square means re-arranging the quadratic equation into the neat, "perfect square" form (x + number)^2 equals another number, or (x - number)^2 equals another number. The point of doing this is so that you can solve by just square-rooting both sides of the equation.

If your quadratic equation starts with...

1) just X^2 (for ex: x^2 + 6x - 7 = 0), move constant to right, add (6/2)^2 to both sides, write left side as perfect square, and square root both sides to solve. Remember you get PLUS and MINUS solutions when you square root the constant side.

2) 2X^2 or 3X^2 or 4X^2 etc. (for ex: 2x^2 - 10x - 3 = 0), move constant to right side, DIVIDE EVERY TERM by leading coefficient 2 on left and right side, add (5/2)^2 to both sides, write left side as perfect square and square root both sides to solve.

3) -X^2 or any negative coefficient (for ex: -x^2 - 6x + 7 = 0), move constant to right side, DIVIDE EVERY TERM by -1 on left and right side. (NOTE: if you had -2x^2 in your equation, you would divide every term by -2 on left and right side). Then add (6/2)^2 to both sides, write left side as perfect square and square root both sides to solve.

If you don't have an X term in equation, (for ex: 3x^2 - 121 = 0), then you cannot complete the square. Just move the constant to the right, divide both sides by 3, and square root both sides to solve. Remember plus and minus solutions on the right.

For more of my math videos, check out:

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  • Himaya Nethmi 3 years ago

    Thanks this was really helpful.

  • reem hamdi 3 years ago

    wow! I actually understood math for the first time..

    • capie44 3 years ago


  • capie44 3 years ago

    * Why did she write the answer (3)², and not 3² ?
    **What does “^’ mean?

  • Abdalle Abdirahman Ali 3 years ago

    thanks for the video

  • Sam Stepter 3 years ago

    thanks nancy!

  • Elizabeth _ 3 years ago

    I watch lots of tuts trying to get through college algebra at the ripe old age of 35, and you Nancy are the only one who explains things in a way my brain can comprehend! Thanks for these videos!!!!!!!

  • its Pia 3 years ago

    this is so easy to understand! thank you!

  • ponypower8 3 years ago

    Off-topic. Just curious, Nancy. Are you a swimmer? The form of your body & long arms are similar to my daughter’s and she’s a swimmer. She’s in gr-9, that’s why I’m watching this.

  • Murtaza Amin 3 years ago

    Nancypi you are so coool

  • Murtaza Amin 3 years ago

    You look bored nancy what’s the matter?

  • Gabriel Onosă 3 years ago

    how do you write backwards

  • Emmanuel Aduwari 3 years ago

    Super helpful. Thanks a bunch!!!!!

  • Nads 4uxo 3 years ago

    Wow you explained this so perfectly! Thank you so much 🙂 and you’re so pretty!

  • TonyDaExpert 3 years ago

    As someone in calc I am looking to avoid this method… last resort for me is quadratic

  • Bárbara García 3 years ago

    why is no one talking about the fact that she is writing backwards tho. That’s a SKILL

    • Pluto 3 years ago

      she just flips the video after recording it.

  • honeybee2145 3 years ago

    It is so helpful when they talk about:- 1) What is …… 2) why it should be done and 3) when it should be done. Thank you for the great video clip.

  • Dinesh Rathnayake 3 years ago

    really thank full .

  • TushDeMort 3 years ago

    My God she made it so easy

  • Nfs Payback 3 years ago

    all positive comments only becuz of the looks. Look Nancy, u teach good and im no one to judge u, but these are all fake fans.

  • iron Man the avengers 3 years ago

    Please kiss me

  • NOW OR NEVER TV 3 years ago

    nice and excellent your work is amazing

  • Abbas Khan 3 years ago

    But how to verify that our answer is right or not

  • CMDR Bobert 3 years ago

    This is the first and only time I’ve completely understood the material. Thank you!

  • Issam El-kassem 3 years ago

    Smart.. gorgeous..and cute

  • Andrew Cullum 3 years ago

    I’ve always struggled with maths, remembering all the different methods and steps, I’m a high functioning Asperger’s, so I’m guessing it’s just a function of my brain.

    • sakib tariq 3 years ago

      Andrew Cullum I’ve never had ASAP burgers. Are they delicious?

    • Dolu Dolu 3 years ago

      @sakib tariq I’M DEAD 😂😂😂🤣🤣

  • VENOMOnLSD 3 years ago

    hey you should become a teacher for a school you’ll teach so much children better than most teachers do…

  • Kat Haug 3 years ago

    This was really helpful, I appreciate how you go slowly and step by step!

  • Danya Mohamed 3 years ago

    Nancy you’re the best🙅

  • Bron Solo 3 years ago

    Is this an alternate method to the quadratic formula?

  • Jamshed Khokher 3 years ago

    I get to things there 1st i understood easily & 2nd i saw the hot girl

  • Kartik27 soni 3 years ago

    nice mam this is very important for my exam and very useful for me

  • The Learning Academy 3 years ago

    Awesome channel I just subbed. Please sub back I can use the support. Also looking for people to collaborate with to make videos

  • Harvey Quiñones 3 years ago

    Beautifully explained!

  • Karma Akabane 3 years ago

    Beauty + brain = just a compliment.

  • Mr Drake 3 years ago

    Not All heroes wear capes

  • Jay Jay 3 years ago

    what amazes me the most is the way she writes on the mirror without getting confused. She writes in reverse

  • Melvin Odhiambo 3 years ago

    From her perspective, is she writing backwards? Just asking…

    • MNMs 84 3 years ago

      Melvin Odhiambo no she’s writing normally but she flips the video when shes editing so it looks normal to us

  • Riafee Estillore 3 years ago

    thank you po Sis

  • Zimpan zee 3 years ago

    Her face still look pretty even the video’s in low resolution

  • Chase Pearson 3 years ago

    It tool me forever to figure it out. Shes actually inverting the footage so she can write regularly Irl.

  • Qishi Li 3 years ago

    One of the greatest mysteries of mankind is – how the hell does she write backwards?

    • Seth Ellis 3 years ago

      I think she may be the original to use this novel idea. Maybe not, but she made it cool.

    • ComSciNerd 2 years ago

      I swear I thought it was editing but nah its too good, she’s actually a robot lol

    • Aditya srivastava 2 years ago

      Umm well I think u know what is mirror effect

    • ComSciNerd 2 years ago

      @Aditya srivastava But look at her hand, if it was mirror effect then her hand would be backwardsright?

    • Aditya srivastava 2 years ago

      @ComSciNerd well let’s come to a conclusion that she is a superhuman that could write backwards

  • Hidaya Nisha 3 years ago

    Very nice 👍👍👍

  • phil CORCORAN 3 years ago

    hi what would the vertex of this equation be. thanks

  • Swayam Mundhra 3 years ago

    Great we need teachers like u beautiful and intelligent

  • Jhanell Crawford 3 years ago

    This helped me and I’m in the tenth grade

    • Chica 95 3 years ago

      Good for you kid👌 im 36 years old in college😂 learning algebra2.

    • Dolu Dolu 3 years ago

      @Chica 95 yikes

  • Max Paiva 3 years ago

    Nancy u hot

  • Apax 3 years ago

    @NancyPi on the second problem that you did you forgot to bring down your x^2 constant (the a value)
    you should get 2(x-(5/2))^2=(31/4)
    good video though

    • Apax 3 years ago

      your x values will be diffent as well

  • Amza Qamran 3 years ago

    Very nice nancy

  • Oh Gawd 3 years ago

    I dont know why I’m here this is so easy! Now explain how to do csci math please.

  • Reefa Hall 3 years ago

    Only thing I would suggest. Could you completely do the problem even if we did it in example 2. Instead of just saying it. Just cause some of us need to see it all the way through. Other than that I’m so grateful for your help. Actually better than my professor, so thanks a million 💯💪🏿

  • Roque Medina 3 years ago

    Hermosora de mujer

  • ammad ameen 3 years ago

    I would never miss my class if i had such a beautiful maths teacher <3

  • Kurei Wekmara 3 years ago

    I really enjoy my time with this,
    Thanks very much

  • nathan blade 3 years ago

    your hot

  • nathan blade 3 years ago

    dam your so hot

  • ahmed musa 3 years ago

    completing the square is not fascinating But you are fascinating I wish I can meet you

  • Kirsti Siitonen 3 years ago

    This helped me a lot since our teacher doesn’t explain every step. I had no idea of the part where you have to square root the both sides. It just like magic how our teacher jumps from one step to another without any explanation.

  • Ophiuchus123456789 3 years ago

    Hello Nancy.
    These videos are great. I’ve immediately subscribed for three reasons: –
    1) I’ve taken on A level Maths and I’m struggling.
    2) Your teaching method is nice and slow. Clear and concise.
    3) You are very attractive so it’s extra motivation to watch your content.

    Cheers m’dears.

  • Sedara Liyanage Somadasa 3 years ago

    If you are a teacher especially on the internet please make sure that you are dressed properly your dress is good for 3 places of B
    No where else

  • Anan Baban 3 years ago

    Best video on the subject.

  • One More Sub Please 3 years ago

    X=-b(+-)sqrt b sq – 4ac/2a another way you could do these problems *the harder way*

  • Sara3346 3 years ago

    around 10:28… why cant I multiply both sides by each other so I can their…uh LCM… y’know the smallest term both go into, to get 72/8 which can become 9? why can’t I do that?

  • Sara3346 3 years ago

    Would the answer to that last have been: x+ square root of 3 = +- squaroot of 2?

  • Sergio Menacho 3 years ago

    Wow you’re gorgeous

  • Ghais Saleem 3 years ago

    9:54 why have you chosen 2 why not another number?

  • Eiad DS 3 years ago

    My brain gaining more cells 👌

  • Kirari bel 3 years ago

    Thank You! Very much ❤️❤️i have a test tommorow and i finally understand ❤️🙏🙏🙏🙏

  • FEBRI ANSYAH 3 years ago

    Ora ero basa ne blasss aku🤣🤣🤣

  • FEBRI ANSYAH 3 years ago

    Sopo wong jowo seng delok angkat tangan

  • Alissa Pomicter 3 years ago

    I luv u thank you

  • Costanza Greggi 3 years ago

    omg this video is legit

  • Mohamed Fathy 3 years ago

    Again! I love you

  • Chris Robinson 3 years ago

    Once again, thank you for your help.

  • Gary Hughes 3 years ago

    Love the video Nancy but can’t work out whether you’re left-handed or right-handed! Learning a lot from watching these videos. Have you done anything on Circle Theorems and Probability, especially the And / Or Rule and Conditional Probability?

  • Vin Mandalore 3 years ago

    How are you writing this backwards for us to see this????

    • Vin Mandalore 3 years ago

      Okay nvm I see it now. Looked at her other vids.

    • Smoky Burger 3 years ago


  • Christiana A 3 years ago

    This is the only video I found that helped me

  • Veritas et Aequitas 3 years ago

    No radical expressions if it can be a short, terminating number! Seriously, you want to then evaluate -sqrt(3) all over 2??
    -5/2 is just -2.5, so (x – 2.5) = + – 7.75. Just solve this! It’s easy!

  • TheMysteriousOne 3 years ago

    shes so hot

  • Muhammad Azam 3 years ago

    5:00 where did 6x go

    • Massimo Kincses 3 years ago

      It became 3

  • Arin Kumar 3 years ago

    She kinda hot tho

  • mattingspree 3 years ago

    This method of completing the square is so convoluted and over complicated, it really makes you appreciate the Quadratic Formula that we all take for granted

  • Shreyansh Pandey 3 years ago

    you are the reason why i won’t fail add maths

  • isobar 3 years ago

    A beautiful lady explains a beautiful concept…

  • Lucy Geddes 3 years ago

    i honestly dont think im straight anymore i wanna marry her

  • Bernie G 3 years ago

    At 4:28 where did the 6X go??

  • brad dyess 3 years ago

    I am never gonna get smarter, Ugly teachers only from now on!

  • RetroPixels Gt 3 years ago

    my test is tomorrow

  • imtiaz malik 3 years ago

    Very helpful…..

  • sebastian gianni 3 years ago

    each lesson starts and equates to the ultimate answer = mathematical, beautiful.

  • Rocco Vitiello 3 years ago

    Why does Nancy look like she’s about to have a mental breakdown?

    • Anugraha Abraham 3 years ago

      yeah she sounds like she gon cry 🙁

    • Seth Ellis 3 years ago

      Grad school is stressful y’all. I just graduated with my math masters and nervous breakdown is usually just a couple steps away. 😉 She may be stressed in the making of this video and yet she shows up and delivers really valuable help. (Especially now that school is online)!

    • matar mbe 3 years ago

      cos her boyfriend is kinda wanker

    • Toph Beifong 2 years ago


    • Anugraha Abraham 2 years ago

      @Toph Beifong ?

  • Neetu Upadhyaya 3 years ago

    Ak study1024 is better than this channel

    • Neetu Upadhyaya 3 years ago

      Ak study 1024

    • Warsin 3 years ago

      Ok boomer

  • James Martin 3 years ago

    You’re an awesome instructor!!!

  • Michael Jetnikoff 3 years ago

    Hi,happy to see thee here,bliss,XAMBUNJILOM

  • kanan kanan 3 years ago

    Her smile after each step simply kills me

    • Hashim AL-Rawi 3 years ago


    • They call me Ching chong 2 years ago


    • Kram 2 years ago

      ik like why she look like she tryna flirt with us?

  • Jonathan Ciesla 3 years ago

    Nancy is a evil witch in which she doesn’t know who the sorority girl that took her to a sun tanning bed to increase their intelligence and trick people into making this video to show off that intelligence when it was actually a depressive approach of exterminating the valentine day clones that my friend Samantha stopped through a religious boyfriend.

  • Amy Lorrimer 3 years ago

    My teacher doesn’t explain anything, for days now when she’s written the positive and negative next to the square root I’ve been thinking she was just underlining the positive symbol so it was clear to us😂🤦🏼‍♀️

  • Pdawg 3 years ago

    Ur hot

  • Entertainment By Na Maloom Afraad 3 years ago

    Looks hottt

  • Warsin 3 years ago

    So this is the power of the internet so much better then my shit math teacher

  • THIEFY STEALS 3 years ago

    useless stuff never to be used in life

  • PETER SWEET 3 years ago

    after seeing a bunch of your videos , i got to ask . can you do something thats not a factorial ?

  • Tasmia Marzan 3 years ago

    Black and Pink markers
    Nancy in ypur area (with math) and also

  • vandana singh 3 years ago

    But why we need to solve it in this method because factorization method is much easier

  • Dymo 3 years ago

    u see i already know how to do this…

    • Dymo 3 years ago


  • Gaming zone of world 3 years ago

    Math teacher should be like nancy

  • Gaming zone of world 3 years ago

    What you tell guess

  • Gaming zone of world 3 years ago

    Than math will be most eat subject write or wrong

  • Ana Alicia de Paz Noriega 3 years ago

    NancyPi literally saves my life every time! Honestly your explanations are very clear and you explain each step perfectly in a way I don’t forget me, btw Im comment number 1000 !!!!

  • Ominous 3 years ago

    Thanks Nancy this helped me mémorise it and understand it a lot. I doubt I’ll forget how to complete the square for awhile aswell

  • Wynter 3 years ago

    imagine sexualizing a math teacher. You people are disgusting.

  • tripp jones00 3 years ago

    nancy r u ok? u seem very upset.

  • Vanessa Escalera 3 years ago

    she is too calm about this lmao. while I’m freaking out. 1 hr 53 min before the final LOL

  • Daniel L. Phillips 3 years ago

    I’d have to practice this stuff for two months… It doesn’t stick..

  • David Ivey 3 years ago

    “You don’t have to like it, but you can like my video.”
    I did.

  • Mamatha K. K 3 years ago

    last sum is probably wrong because 6 over 2 is 3 , but u wrote it as 4 ..??

  • rant404 3 years ago

    Mistake at 17:33? (6/2)^2 = 3^2 = 9. On the RS 7 + 9 = 16 SR of 16 = +/- 4. SR of 25 should not be on the RS. Simple factoring gives answers of 1 and -7. Not -1 and 9 which (x – 4) = +/- 5 would yield.

  • frank sigwart 3 years ago

    (× – 3)^2 = 9
    (× – 3) = 3
    X = 6

  • Jason Albers 3 years ago

    nancy kinda bad ngl

  • Иван Иванов 3 years ago

    Нэнси- учи теорему Виета и формулы с дискриминантом.
    Твои примеры школьники России решат в 5 раз быстрее

  • Huggimonster 3 years ago

    I think the main reason that Nancy is quite successful here is that she sets out why she is taking the steps she does (as some have mentioned). As a Math(s) teacher myself, I think another reason why some of those of you who have commented here think it’s easier to learn by watching a video is that, in class, the teacher is often distracted by disruptive pupils who try to make a game of stopping the learning process because they don’t want to be there in class. If you’ve taken the trouble to look this up on the internet then you’ve already invested some effort yourself, and you’ll take more interest in what’s happening, and you won’t have competing distractions either.

  • shatishankar yadav 3 years ago

    This nothing but 2ab formet( a+b) *2

  • Marcus Po 3 years ago

    Are you single? Let me know please.

  • Stitch The cat 3 years ago

    You need this method for circles, ellipses and hyperbolic functions.

  • TaubHau Hlau 3 years ago

    Wow its math autonomous sensory meridian response!

  • chris ashton 3 years ago

    Beautiful! Thank you for sharing.

  • Veritas et Aequitas 3 years ago

    And what if it’s something with a leading coefficient that doesn’t factor out nicely, like 12x^2 -3x + 8?

    • Death storm 3 years ago

      Uncomfortable Truth quadratic formula ?

  • Youssef awad 3 years ago

    How did you get rid of the 25/4 in equ. 2x^2-10x-3

  • angelino z 3 years ago

    video is well explained, firstly. but your silky smooth arm pits are a distraction.

  • Willie Jernagin 3 years ago

    your last problem you lost me.

  • Alain Mehani 3 years ago

    The hair flip gets me every time

  • Antonio Milaré 3 years ago

    Don’t say “ midle term” , rather say “ the coeficient of x”…so not to confuse people

  • Renu Saini 3 years ago

    U are so cute.

  • alain robert 3 years ago

    you are very beautiful nancy !

  • WanSolve 3 years ago

    Great video, thanks! Can’t understand why any of the Thumbs Down for it.

  • william kroth 3 years ago

    What a beauty!

  • wediy hntsa 3 years ago


  • Amir Eghbal 3 years ago

    U r so beautiful

  • slcochran 3 years ago

    Thank you!!!!

  • Ping Mendoza 3 years ago

    This is the best lecture I’ve ever seen.

  • Naail 382 3 years ago

    what happened to the +9?????

  • Renato Camacho 3 years ago

    God bless🙏🏽🙏🏽

  • π-DAY 3 years ago

    Iam 10,000th liker

  • bug659 3 years ago

    Very helpful 🙏

  • leso204 3 years ago

    Why ??

  • Captain Bob Smiley 3 years ago

    +/- Fascinating.
    BTW, if you realize what you are actually doing on the cartesian plane you won’t forget the ‘+’ and ‘-‘ solutions, it becomes obvious that there are two solutions.

  • DrgonPhart 3 years ago

    AGS 2 is killing me

  • Lincoln Lamounier 3 years ago

    Enrolada demais…..

  • John Roehsler 3 years ago

    Awesome teacher for sure. My professors suck compared to you . Thank you for helping people.

  • DistanteInstante 3 years ago

    she is so beautifull. I love how relaxed and calm she explains… Beautiful teacher and woman

  • Easwari Senthil Kumar 3 years ago

    Bruh any Asians here learning this when they are 13

  • Damon Barber 3 years ago

    I clicked the like button. Thank you for the exblination.

  • Justin Samupindi 3 years ago

    Thanks Nancy!

  • Sheikmydeen Meerasha 3 years ago

    U sexy

  • SuperBad 3 years ago

    X=7 or x=-1

  • Arturo Aguilar 3 years ago

    Teacher, you are so beautiful

  • Abcde 3 years ago

    Plot twist: She is right handed and writing normally on glass, and the video is flipped horizontally.

  • Powell Gill Trotman 3 years ago

    Is she actually talking? I didn’t notice. 🤭 I’ll be her student.! Wear a bikini next time and watch your view count skyrocket. 🚀🚀

  • E Mqz 3 years ago

    sweet baby jesus!!!!!!!!!!!

  • Antopia HK 3 years ago

    This is an educational video and people still disliked the video??

  • Matege Derick 3 years ago


  • Lilian Sirbu 3 years ago

    I was sure that your nick name was related somehow to the Python scripting language )))

  • Troy C 3 years ago

    I only wish I had a math teacher which looked like her in college

  • Troy C 3 years ago

    There is a reason we have never landed on Mars over 50 years after having landed on the moon. Engineers and mathematicians are still trying to figure out the calculations by completing the square.

    • Coolboy 2312 3 years ago

      India did it

    • Cheng chang Chu 3 years ago

      @Coolboy 2312hahahaha.. what endia did…fail moon mission

    • Coolboy 2312 3 years ago

      @Cheng chang Chu no man in 2014 indian rover landed on Mars and it’s INDIA not endia

  • Troy C 3 years ago

    Isn’t anyone else impressed that Nancy is an MIT grad

  • Dennis Rendfrey 3 years ago

    Again your my go to person when I need to learn something!! I tested into college level algebra, I’m now in pre-calculus and I’ve never learned this. My class mates have done this in high school. Thank you again !!! This will make my Math Journey much easier. I’m 68 years young and enjoying college!!!

  • Nimi Sygns 3 years ago

    beauty and brains. love!

  • Jaime Valencia 3 years ago

    She so sexy! I’ll marry her. 💍👰🏻👨‍👩‍👧‍👦

  • Levvo Morris 3 years ago

    So _this_ is what Billie elish did before singing!
    Jk jk this really helped me understand thank you

  • Gideon Victor 3 years ago


  • sanjay bhatikar 3 years ago

    Good video 👏 Hope to see more of you 😀

  • Robert Maki 3 years ago

    Super sexy math teacher… woohoo.

  • Robert Maki 3 years ago

    Hot for the teacher

  • nothereforlong 3 years ago

    I’m sorry, what equation?… Smart and beautiful, yup.🌹

  • Nad3shot 3 years ago

    This is so distracting

  • Norcal 3 years ago

    all the random little smiles she does before steps. I lost.

  • AQEEL SHAFI 3 years ago

    Weldone Nanci maam

  • Bernard Forrest de Belidor 3 years ago

    My god! I have a nephew to teach, so I came here, but my god she is so damm beautifull

  • MMA Mongow 3 years ago

    Adding number talken from your pocket it IS not possible and never seen or heard before

  • MMA Mongow 3 years ago

    Answer thé opération as the way it is without adding anything else

  • Brandon Foster 3 years ago

    You make me wanna like math 😉

  • Yvng Sauce 3 years ago

    Who elese noticed that we don’t listen to things unless we want to, like how we don’t care to listen in class ,but when we need it we actually listen🤔🤔🤔

  • Gerardo Martinez 3 years ago

    Bonita y and so pretty

  • Rizwan Tahir 3 years ago

    It’s taught for a reason, cuz after this if a student wants to take further maths, or in A levels 1st year math, they can determine if the quadratic graph will be a bell or a U, also you get to the minima and Maxima, also you get to sketch a quadratic graph fast rather than plotting everytime.


  • waqee khan 3 years ago

    Very nice

  • Islam Omar 3 years ago

    what about factorization pretty nancy 😍❤ it is much easy

  • Priscilla Lynn Music 3 years ago

    does she have to write everything backwards??

  • Nick Ciuffetelli 3 years ago

    in the first example, what happened to the + 9 that you had as the constant term in front of x?

  • Sai A. 3 years ago


  • ibrahim elsharkawy 3 years ago

    I want to follow you but I can”t because you are so hot please we are just students

  • Ted Buracas 3 years ago

    Oh, Nancy… no idea why we convert to vertex form of a parabola?

    None at all?

  • Susan Joe 3 years ago

    Amazing explanation, thanks Nancy for sav ng my ass , love you

  • Zach Willey 3 years ago

    Did anyone catch she got the 2nd problem wrong

    • 5'2 Indian Janitor 3 years ago


  • Valeria Revilla 3 years ago

    this is the most helpful video yet

  • Richard Koechl 3 years ago

    A great instructor!

  • samuel gitau 3 years ago

    you so boring cheer up stop making math more depressing than it is already

  • PLAME 3 years ago

    great vid

  • Kenneth Ajuzie 3 years ago

    Great Nancy… Love your pattern

  • TM 3 years ago

    This came back to haunt me in calc 2 for trig substitution. Fellas and gals, learn completing the square!

  • Arif Ryo 3 years ago

    I loove her shoulders…her voice,..her eyes..her smile.. love…

    • Kram 2 years ago

      damn chill out kid

    • Arif Ryo 2 years ago

      @Kram i’m 38 dude..whats your problem..even if i am a kid, thats my right to admire ..

  • Alvaro Goenaga 3 years ago

    Completing the square with her? I would gladly complete all kinds of geometric shapes with her, not only a square.

  • hejustleft 3 years ago

    Nancy, can you tell me a real life application of a quadratic equation.

  • Muhammad Ahsan 3 years ago


  • Fatima Shamsher 3 years ago

    at 5:45 what if the number isn’t a complete square what do you do?

  • إسأل مجرب. Es'al EmJarb 3 years ago

    Hi my name is karas osama and you can call me Marko.
    And I not understand the last question can you make another video.
    thank you from Egypt

  • Mckkie13 3 years ago

    Bruh this is SO much easier then how my teacher taught me!

  • Tim Rubin Halcomb 3 years ago

    Last year, I fell sick and went into a coma. For a while, I had problems getting back my logic skills, but this year is different. I’ve reached an entirely higher level of my understanding of physics. I know where we came from and how we were created. Unequivocally, I do not agree with the bad things that happen here. I love you fellow human beings. I would help all of us, but that would take an extremely large amount of money, and a team of people who are extremely brilliant in mathematics, physics, chemistry, and biology. In addition, they would have to benevolent and trust worthy. I do not agree with the way we are being toyed with.

  • Mark_till Till 3 years ago

    3) is identical to 1)

  • Bauer Stafford 3 years ago

    what a friggin dinger.

  • Nirmala Shelat 3 years ago

    Nancy you are looking hot 🔥🔥 so sexy

  • Stephen Whitlock 3 years ago

    First and third can be factored.
    1.) x^2 + 6x – 7 = 0
    (x + 7)(x – 1) = 0

    x + 7 = 0
    x = -7
    x – 1 = 0
    x = 1

    3.) -x^2 – 6x + 7 = 0

    -1(x^2 + 6x – 7) = 0
    -1(x + 7)(x – 1) = 0

    -1(x + 7) = 0
    -x – 7 = 0
    -x = 7
    x = -7

    -1(x – 1) = 0
    -x + 1 = 0
    -x = -1
    x = 1

    The second one is the only one that really needs “Completing the Square”.

    However, here’s a better way:
    Ax^2 + Bx + C = 0
    B/A C/A
    B/A * -1/2 = -B/(2A)

    (-B/(2A))^2 – (C/A) = (-B)^2/(4A^2) – C/A = (-B)^2/(4A^2) – (4AC)/(4A^2) = ((-B)^2 – (4AC))/(4A^2) = (B^2 – 4AC)/(4A^2)

    x = (-B/(2A)) + Sqrt((B^2 – 4AC)/(4A^2))
    x = (-B + Sqrt(B^2 – 4AC))/(2A)
    x = (-B/(2A)) – Sqrt((B^2 – 4AC)/(4A^2))
    x = (-B – Sqrt(B^2 – 4AC))/(2A)

    Example 2x^2 – 10x – 3 = 0, solve for x.
    x = (-(-10) + Sqrt((-10)^2 – 4(2)(-3)))/(2(2))
    x = (10 + Sqrt(100 – (-24)))/4
    x = (10 + Sqrt(124))/4
    x = (10 + Sqrt(4 * 31))/4
    x = (10 + 2*Sqrt(31))/4
    x = (2 * (5 + Sqrt(31)))/4
    x = (5 + Sqrt(31))/2
    x = (-(-10) – Sqrt((-10)^2 – 4(2)(-3)))/(2(2))
    x = (10 – Sqrt(100 – (-24)))/4
    x = (10 – Sqrt(124))/4
    x = (10 – Sqrt(4 * 31))/4
    x = (10 – 2*Sqrt(31))/4
    x = (2 * (5 – Sqrt(31)))/4
    x = (5 – Sqrt(31))/2

    So, the answers are:
    x = (5 + Sqrt(31))/2
    x = (5 – Sqrt(31))/2

    the last one is even simpler
    4.) 3x^2 – 121 = 0
    x = Sqrt(-C/A)
    x = – Sqrt(-C/A)

    x = Sqrt(-(-121)/3)
    x = Sqrt(121/3)
    x = 11/Sqrt(3)
    x = -Sqrt(-(-121)/3)
    x = -Sqrt(121/3)
    x = -11/Sqrt(3)

  • Knightstudio 3 years ago

    thank you so much now I understand complete square unlike my math professor expect me solve problem without explain full detail skip step

  • Hilary King 3 years ago

    I’ve fallen in love with her, actually

  • Mae CDA 3 years ago

    Thank u for talking through all the steps slowly!

  • channel May May 3 years ago

    O my God this girl is wonderful in teaching mathematics, please try to reach me any time you up load a video of mathematics
    I really appreciate you thanks

  • one 2 3 years ago

    If she was my teacher I would of passed.

  • SEM MES 3 years ago

    Nancy can you please do a tutorial on this question its driving me crazy….have fun with this cause i still dont get it and really need an explanation….thanks from Canada…

  • VeronicaHotGames 3 years ago

    Hard to learn something when your teacher is sexy

  • Michael Jetnikoff 3 years ago

    Hi,be free born still free ,thanx,XAMBUNJILOM

  • yoonis khaliif 3 years ago

    Nancy you are great teacher, not only teacher but also gorgeos. I try to fucus on the equation but i forget i just look at you. So try again and again. But anyway thanks for you sharing your education

  • Gabe David 3 years ago

    this teaching was so prolific

  • Ot Kw 3 years ago

    Thanks a lot!

  • Mark Kennedy 3 years ago

    Nancy’s lovely. Go Nancy!!

  • Sajidkhan Khan 3 years ago

    Thanks Nancy mam

  • Rita Anand 3 years ago

    U are from which country

  • Gracie Mosko 3 years ago

    How does the sqwuare root of 16 have two possible answers? There is only 1, 4.

  • diego ceniceros 3 years ago

    You’re so cute its distracting.

  • Mason Mortensont 3 years ago

    Very very helpful I hear screaming good grades on the way

  • Safaaldeen Al MDARS 3 years ago

    حل المعادلة من الدرجة الثانية بطريقة اكمال المربع

  • Nish 786 3 years ago

    This is so beneficial am in grade 10 and my teacher takes 1 week to explain the whole sum nicely but here in a short period of time i get it correctly in my head.I have an exam tomorrow and this is very beneficial.Thank you NancyPi

  • جاسم كورنيش 3 years ago

    ياصف هذا

  • Stitched_MaskSFM 3 years ago

    This method is easily explained by you, teachers did it in a different order or something which is way complicated. im following your method

  • michael wellington 3 years ago

    Miss NancyPi I missed out on med school because, in high school, I didn’t have a math teacher like you. I’ve decided to watch each one of your tutorials and conquer this beast that got in my way. Thank you

  • Ken Haley 3 years ago

    At 1:30, you said “you can’t complete the square.” But you CAN! Just do this:
    3x^2 – 121 = 0
    3x^2 = 121 (adding 121 to both sides)
    x^2 = 121/3 (dividing both sides by 3)
    Now the left side is a perfect square! Proceed as in the other examples to get x = +|- sqrt(121/3), which is 11/sqrt(3), or (11 x sqrt(3))/3.
    It’s just like the other problems except the coefficient of the x-term (the middle term) is zero! Half of zero is zero, so you just end up with (x + 0)^2 on the left side, which is just x^2.

    • Shiv Kanade 3 years ago

      This is exactly why you can’t complete the square.:)

    • Ken Haley 3 years ago

      Shiv Kanade what do you mean? Completing the square means making a perfect square on the left side of the equation. That’s what I did.

  • Silly Summerberry 3 years ago

    OMG. Best video on YouTube. Thanks man!

  • Thumper baby Bambi 3 years ago


  • stfu 3 years ago

    Thakyou so much thankyou so much i was stuck on this question for the whole day and finally got it!!!

  • Abhinav Sahal 3 years ago

    Add math gang wya

  • Sammy Hamawi 3 years ago

    Brains and beauty

  • Usama rafieck 3 years ago

    Do you have some video on hyperbola?

  • Pens Suck 3 years ago

    She can teach me anything she wants.

  • Tyrone Kim 3 years ago

    I like your detailed explanation and the detailed written steps. Thank you.

  • Maria Makinen 3 years ago

    —–>>>> hopeless. Me.

  • Garfield Show 3 years ago

    “Well what do you know for *Completing the Square (NancyPi)* ”
    ” Psst { x=6 } Ten seconds / I.Q. 160″

  • Mkultra K 3 years ago

    Poorly explained, articulating “root” and what that means as opposed to “divide by 2” is ‘teaching’ as opposed to ‘talking’. Very hot, but actually less edifying then my 6th
    grade math class

  • Tryingmybest At life 3 years ago

    Good technique. Thanks!

  • maureen McCormick 3 years ago

    TJANK YOU LOVE YOUR WORK👯‍♀️👯‍♀️👯‍♀️👯‍♀️👯‍♀️👯‍♀️

  • Lara Smith 3 years ago


  • Skydiver 3 years ago

    Two big problem

  • MMA Mongow 3 years ago

    For me is incompréhensible. Not well explaining

  • Mike Bell 3 years ago

    Always wonderful Nancy taaa

  • Beau P 3 years ago

    I’m getting Jodi Arias vibes

  • Howard Beale 3 years ago

    Where do I sign up for private tutoring?

  • Mr. Skips 3 years ago

    Thank you for explaining during coronacation. Better than my own teacher.

  • Justin James 3 years ago

    I really loved the lesson very much

  • Costin Barac 3 years ago


  • Adil Mf 3 years ago

    amazing, appreciate it

  • Azeem Syed 3 years ago

    u might be mit but have you ever studied in singapore HAHA

  • David Emerling 3 years ago

    People often don’t realize that the quadratic formula is really just completing the square for ax^2+bx+c=0. Basically, you can derive the quadratic formula using the completing the square method.

  • Fatima Ibrahim Karam Alkhoori 3 years ago

    wala i love you so much you helped me alot

  • Michael Turner 3 years ago

    very helpful, clear explanation

  • José De Jesús Gilabert Chavez 3 years ago

    Facil x = 6 sale en firma directa xd 😘😊😉

  • ClaytonLivsey 3 years ago

    Charming as hell! You can get my like!

  • Jewwy Meek 3 years ago

    My textbook explains things in such unnecessarily complicated ways lol. Thank you Nancy!

  • Adam Soomro 3 years ago

    I remember that Nancy used to work for some tuition company on Youtube and then she looked pissed and about to cry in every video. Now she looks alot happier to be teaching the masses under her name. You go Nancy!

  • Alex Wang 3 years ago

    Isn’t the third answer wrong? Half of 6 isn’t 4 and the answer should have been the same because it was the same problem as #1 after the second step.

  • The Concept Academy 3 years ago

    Wish i had this math teacher

  • احمد غازي ابو جياب 3 years ago


  • Michael Salzarulo 3 years ago

    I’m a square… Complete me?

  • Das Wunder 3 years ago

    so what is the two values of X in equation Nr.3

  • Steven Williams 3 years ago

    The most gorgeous mathematician of all times.

  • quality Boy 3 years ago

    Beautiful, love math. A dream woman. Wow

  • Collateral Dabbage 3 years ago

    I appreciate you so much!!!

  • Sergio Guzman 3 years ago

    I know this, but I came for the teacher

  • Betto 3 years ago

    I like the way how you explain it..
    Thanks,, you beaut & intell…

  • No Zack 3 years ago

    3x^2 – 121 = 0 –> (x-0)^2 = 121/3 the zero is trivial but equation is in ‘complete the square’ format

  • Michael Pietrs 3 years ago

    My 6-month-old grandson likes to watch your videos.

  • asianboy 9000 3 years ago

    when you divided -10 by shouldnt the out come be a positive cause and negitve and a negiitve make a positive

  • Jerry PEAL 3 years ago

    Mirror? Perhaps but a straight on shot where’s the camera ?

  • mfridz 93's 3 years ago

    I cant concentrate with the numbers and square….

  • ayoub 3 years ago

    thank you

  • Sohail Javed abbasi 3 years ago

    Teacher is so gorgeous

  • douglas david misas camacho 3 years ago

    DID ANYONE REALIZE AT THE DESCRIPTION OF the vid. it is stated that she is MIT GRADUATED? . Yes boys we were born just at the time to see this!!!

  • Alexis Leyva 3 years ago

    Hi, saludos desde México

  • Nyambe Glen 3 years ago

    Everybody blaming their teachers..I blame mine too 😂😂😂

  • Abdul Raheem 3 years ago


  • Ali Asjad 3 years ago

    during the lectue my eyes was not on lecture hhahaha….my eyes was on the madam’s neck ahahaha cute

  • Judson Stephens 3 years ago


  • Seth Bender 3 years ago

    so fine

  • Michael Rodriguez 3 years ago

    Nancy pi we need you to solve this covid problem now 😂😂😂

  • GECKman88 3 years ago

    Wait, for problem one near the end she said x-3=4-3=1 and x-3=-4-3=-7, when what was written was x+3=4, so, are they both x-3 or is it meant to be x+3 and x-3?

  • dtran262 3 years ago

    Solve the 1st equation we see A+B+C=1+6-7=0 then definitely the result will be x=1 and x=C/A=7/1=7. It works all the time when we realize that A+B+C=0 then X=1, x=C/A

  • Free Radical 3 years ago

    I like you and it’s rare for me to say that.

  • Hans Hoerdemann 3 years ago

    Can she be better looking than she is smart? Yes.

  • daniel velandia 3 years ago

    you are so beautiful thank you so much

  • Abu Usman 3 years ago

    Hello..teacher .where are from

  • Abu Usman 3 years ago

    What country you live in

  • ABHISHEK TIGER 3 years ago

    Thanks, very good apporsch,would you like to give me your whatsapp …..

  • Benjamin Rice 3 years ago

    Im watching it while doing the test

  • Ava :D 3 years ago

    This was a life saver

  • Gillian 3 years ago

    is no one else worried that shes being held hostage? why is she so nervous

    • Kram Nevo 3 years ago

      Hahahaha, what a mind

  • Tim Rubin Halcomb 3 years ago

    I could never be a square, but nice video. ha ha

  • Sameer Katte 3 years ago

    Anyone notice for the first one x=a and x=c

  • Omni Slash 3 years ago

    Halfway through the video I just realised I was looking at her the whole time. I feel like a creep.

    • Momina 2 years ago

      Yup, you must be

  • Jorge De los Santos Razo 3 years ago

    make a video on what is needed to get into MIT, or atleast show how you got on

  • vansh 3 years ago

    The best teacher

  • Vedha56 dias 3 years ago

    Thank you

  • MWT Frooo 3 years ago


  • DHRUV CHAUHAN 3 years ago

    You are superb

  • Jethro Morquecho 3 years ago

    Very beautiful

  • فواز مبارك ثويني 3 years ago


  • Les Brown 3 years ago

    If you can’t do fractions, forget algebra!

  • Les Brown 3 years ago

    I used to struggle with this in high school.
    Now I can usually figure it out in my head.

  • Lewis Battle 3 years ago

    Lord knows shes fine ♥ hopefully this helped for the final

  • ACID CLAN 3 years ago

    someone do this …
    X^2 + 3X -1 = 0

    • Caroline 3 years ago

      ahh! ok
      ya know what im too dumb nvm

  • Jujhar Singh 3 years ago

    She looked like she went to sleep herself about 20 times while making this video

  • Ani Edits 3 years ago

    ThAnK yOu, I finally get it

  • S H 3 years ago

    After completing the square, please complete me by becoming my other half. 🙁

  • filmATOR98 3 years ago

    No one is asking the important question: How does she talk from behind a glass? xD

    • matar mbe 3 years ago


    • Momina 2 years ago

      Are you THAT stupid?

    • Aftab Khan 2 years ago

      Microphone man

  • David-Paul 3 years ago

    Brilliant video you are my survival teacher you sound drunk as a skunk at 0.75 playback speed.

  • David-Paul 3 years ago

    Took me two days to solve one of these trying to do one of these with ADHD is hell but the again what isn’t?

  • Amir Eghbal 3 years ago

    Ur a cutey pie. Will you be my girl friend? We can complete squares together.

  • Marco Ramonet 3 years ago

    Im in love with you

  • A.INFINITY 365 3 years ago

    Would u please tell which software u r using?

  • SuprSloth 3 years ago

    nobody going to talk about how she’s writing backwards?

  • Augusta Yarteh 3 years ago

    Nice one. Nancy x squre + 6x_7 = 0
    _7+7 0+7= to 7 then cancel both _ 7 and the + 7. Then i will work on plus minus. This problems I need to work them on paper because i have to show you my two solutions which are my answers. Nice brave explanations.I have two different ways to solve those problems. I really like the way you are narrating on it mrs. Perfect explanations.

  • Mets ton empreinte 3 years ago

    how du u write backwards soooooooooooooooooooooooooooooooooooooooo well plz plz plz telllllllllllllll

  • Tech Wes 3 years ago

    she looks terrified yo

  • Todd B 3 years ago

    How are you able to write, seemingly, backwards?

  • Todd B 3 years ago

    I sure wish my engineering professors were like Nancy. I would have understood things much better.

  • the159753123 3 years ago

    She could hypnotize me any day.

  • Mazin Nasralla 3 years ago

    For equations where the coefficient is greater than 1, e.g 2x^2, tis method allows you to find the points where it crosses the x axis but it changes the minimum point (-h,k). Be aware of that. Completing the square is often used to find turning point and method here wont always work for that.

  • 大名 3 years ago

    Nice video 👍

  • I love puppies 3 years ago

    So pretty 😍😍

  • Sr11 Rami 3 years ago

    Who is watching this u r more likely to be flirting or kind of so proud of what u r doing to be honest in my country kids of 12 doing this as easy as glass of water i dont know how u can be that confident its nothing baby try something harder .. u might get more views 😜😜😜

  • jas math 3 years ago

    Great idea

  • Sunil Agarwal 3 years ago

    Love you😘😘❤️😘❤️😘❤️😘

  • Arvind Kumar 3 years ago

    Mam you are very fast than my mind but I like your explanation❤❤❤


    #good maths #smart learning

  • TAKATSO LEGWABE 3 years ago

    You are good with every maths concept i have ever watch u doing. Salute

  • Pabitra Saikia 3 years ago


  • English Tutor 3 years ago

    Nancy, thanks for are smart and insanely attractive teacher))

  • Bill Lenker 3 years ago

    As a retired professor, I’m impressed in how Nancy is handling this tricky material.
    The explanation is outstanding. Also, us sinistrals are very happy that she’s left-handed and very capable with this material.

  • Anugraha Abraham 3 years ago

    thank you!

  • Seth Ellis 3 years ago

    The usefulness of this is that most quadratics do not cross the x-axis at nice integer values. Factoring only works with nice values (no fractions or decimals), but completing the square and quad formula solve all quadratics including those that don’t cross the x axis at all (2 solutions in the imaginary number system). I prefer completing the square to quad formula when a=1 (no coefficient other than 1 on x² term). Usually it’s just add b² to both sides and simplify with a square root. Same solutions as quad formula and I think more efficient (unless we can use a spreadsheet just to enter a, b, and c). Oh, and completing the square is really valuable for other things like graphing conics.

  • ariel 3 years ago

    yooooouuuuuuuu taaaaaaaaalk tooooooooooooo slooooooooooow

    • jeykeyjoseph 3 years ago

      playback speed can go up to 2 times, or you can get a chrome extension buddy.

  • Violent_Bebop 3 years ago

    So eloquent and pretty 🙂 yay for math

  • OG cHiPs AhOy 3 years ago

    5:50 “easy”
    Me: kill me now

    • Nokia 3310 3 years ago

      I feel you bro

    • OG cHiPs AhOy 3 years ago

      @Nokia 3310 lol

  • Olama Vincent 3 years ago

    Thanks… You are very nice in your explanation

  • 62 X B Poorti Sawant 3 years ago

    hey Nancy
    are u camera cauncious

  • MATTEIO MATT 3 years ago

    Fact: she wrote all of that in backwards

  • Johann Goethe 3 years ago

    Bueatiful AND Extremly intellegent. The ladies will be jealouse and the guys will do well in class!

  • S.JOSHUA KEVIN 3 years ago

    Nancy this helped me a lot 🙌🏻💯

  • Jacob Mach Ayuen Malok 3 years ago

    that’s great move….thanks for your tireless effort you helped us with..

  • Deez Guy 2 years ago

    What accent does she have? Its extremely soothing… Its an asmr video without even being made for one…

  • Jeremiah Spain 2 years ago

    I completed all my math courses, but now I’m watching this because Nancy is my YouTube crush.

  • Dter 2 years ago

    My math teachers never taught this to us and I’m studying engineering now lmfao, you’ll need this in calc 2 to solve integrals

  • BILINIORE _YT 2 years ago

    Who is watching 2 hour before test

  • iZAP Math 2 years ago

    Nancy, you are doing a great job at explaining problems and showing the steps! Keep up the great work!

  • SUSHIL KUMAR 2 years ago

    It just a simple qutiouns I was make one table, and this table use solve all quadratic equation qutiouns

  • Cyborg 2 years ago

    nancypi = nancy3.141592653589793238462643383279502884197169399375105820974944592307816406286 208998628034825342117067982148086513282306647093844609550582231725359408128481 117450284102701938521105559644622948954930381964428810975665933446128475648233 786783165271201909145648566923460348610454326648213393607260249141273724587006 606315588174881520920962829254091715364367892590360011330530548820466521384146 951941511609433057270365759591953092186117381932611793105118548074462379962749 567351885752724891227938183011949129833673362440656643086021394946395224737190 702179860943702770539217176293176752384674818467669405132000568127145263560827 785771342757789609173637178721468440901224953430146549585371050792279689258923 542019956112129021960864034418159813629774771309960518707211349999998372978049 951059731732816096318595024459455346908302642522308253344685035261931188171010 003137838752886587533208381420617177669147303598253490428755468731159562863882 353787593751957781857780532171226806613001927876611195909216420198938095257201 065485863278865936153381827968230301952035301852968995773622599413891249721775 283479131515574857242454150695950829533116861727855889075098381754637464939319

    thats a small one

  • Adair Mendez 2 years ago

    u made teaching look easy, why the hell I go school

  • fandom encounter 2 years ago

    I don’t usually like videos but when she says u don’t gotta like math but u can like my video, I feel like I just gotta like the video

  • Syahrizal Guru Freelance 2 years ago

    Mudah dipahami, tapi, bukannya ini ribet ya? Jika saat ujian pakai cara itu.

  • Syahrizal Guru Freelance 2 years ago

    Intinya diubah ke bentuk kuadrat sempurna

  • theimpossible Castillo 2 years ago

    so she is writing backwards? 🤔😂

    • Ritesh Tiwari Vidyalaya 2 years ago


  • caperature 2 years ago

    How do we know when to apply this method?

  • Mario Silva 2 years ago

    (x – 3)^2 –> X^2 – 2.3X + 3^2 = 9 –> X^2 -6X = 0 –> X(X -6) = 0 –> x=0 and X=6

  • Unicorn Burgers 2 years ago

    You kind of look like billy eilish

  • Saeed Saeed ahmad 2 years ago

    Mashallah u r best teacher may u live long

  • KI B 2 years ago

    We used to have glass windows in between the offices and they were great for brainstorming and we had a “leave it” note for the cleaner. It was great for communication. Everybody could see what everybody else was working on and could chip in and less time was wasted on formal unproductive meetings. That was the only thing which worked after they removed the drawing boards. CAD can never be as effective as a board for brainstorming or thinking aloud.

  • Math Whisperer 2 years ago

    I think it’s great that Nancy tells us that there are other, maybe better, ways to solve the equation! But of course, students still have to learn this method. Personally, I like the method, but that is personal preference. Great job, Nancy!

  • Ayomide Emmanuel 2 years ago

    Totally helpful🌝

  • Samsway TV 2 years ago

    Doesn’t anyone noticing that he is behind the glass and writing backwards??

  • John Ham 2 years ago

    You’re so beautiful, same as these numbers

  • David-Paul 2 years ago

    I think I have figured it out your right handed.

    • Ritesh Tiwari Vidyalaya 2 years ago

      Just go through the video

  • ComSciNerd 2 years ago

    Thank you such a useful video! Quick to the point without any of the bs

  • Oya 2 years ago

    you are so so good amazing

  • Anonymous 2 years ago

    Her eyes are staring into my soul

  • Aditya srivastava 2 years ago

    She explain so well a person like me also understood 🙂 thx

  • FAUCET EXPERT 2 years ago

    Too much beauty in a single woman

  • john webb 2 years ago

    Thanks again Nancy for you’re invaluable info. Best regards. John.

  • abubakarr kanu 2 years ago

    Great work , thanks

  • LilKubs 2 years ago

    im more impressed of how shes writing in reverse than how much better she is than my own teacher

  • MrVoayer 2 years ago

    Helpful and valuable! As is always the case with your videos, Nancy.

  • Samurai 2 years ago

    Thanks alot nancy for helping me.i Have a huge test tommorow and my math teather speaks GIBBERISH.thanks alot

  • Bowchi 2 years ago

    i still dont understand i think im just dumb

  • Oisin O'Reilly 2 years ago

    on the first example. where does the “9” disappear once you get to (x+3) = 16? Or is it simply just once of those things in math we ignore once we used it to get the “16” to the right?

  • Are great Manatees 2 years ago

    Is it just me or does she look a little like heyimbee

  • Dennis Shatov 2 years ago

    How does she getting +-√31/2 ??? its a mystery for me!?

  • Dennis Shatov 2 years ago

    in 13:17 How does she getting +-√31/2 ??? its a mystery for me

  • Shaira Dhiman 2 years ago

    I haven’t seen the question I just kept seeing the teacher 😂 in the whole video 😂😂

  • Sakshi Shah 2 years ago

    What a good teaching skill you have Miss Nancy!!
    Loved ur video a lot.. Thanks for such a nice explanation.. Your teaching will definitely get us good marks in such bloody exams❤❤🥰👍👍

Comments are closed.