Sum and Product of Roots

[NormanWasHere]

Thank you, can’t believe I’m about to do my exams at 18 and I haven’t been taught this.

[opolo]

Thank you for also doing the derivation which is not taught a lot of the time. That direct method also makes a lot more sense

[SankalpaSatyal]

Factorised form is so easy to work with

[sagarharsora]

Amazing❤️❤️❤️❤️❤️ I knew this but the way you thought is

[oximas]

i have a quetion, how will knowing the sum and the product of the roots help me later in more advanced math
or phisics
just curious if its just their like just pure math or does it have an accuall use in physics or calculas maybe something of real value
or maybe a use in like a more advanced math idk

[isobar]

All well and good...but what's the utility of this ?

[bobverhoeven]

You are a Good teacher hi from the netherlands

[ericcoyotl]

Hey, I know you are a very busy man(now more than ever) but can you do a video about Difference of roots and deriving that equation?

[alisamitina]

How does the first factorization work? 😢😢

[WellThereYouGo]

It's really simple algebra actually - Eddie Woo

[AB]

Hi and thanks a lot for your videos sir. but I have a question. why didn't you use the delta and finding X formula to find alpha and beta at first?

[ibrahimshuceyb]

This video is 2013 when i was 9 years old

[aashsyed]

i actually prefer to solve quadratics using the quadratic formula

[aryanvats]

I'm can't understand the factorisation at first
Edit:got it!thannks

[amaze]

You probably won't see this and it's a very stupid question I know but, I'm assuming this works with real/imaginary numbers?

[vssudarshan]

Your second step of multiplying a to (x-alpha) (x-beta) is syntactically and mathematically wrong. You cannot simply do it without giving a mathematical justification. While the end result is the same, the correct method is to first convert ax^2+bx+c=0 to the form x^2+(b/a)x+(c/a)=0. Then equating to the roots.