Question

help im doing product of polynomials
find the product:

(3x-4y)(x-y)

Answer 1

Do you know about FOIL method?

Answer 2

https://www.khanacademy.org/math/algebra/multiplying-factoring-expression/multiplying-binomials/v/multiplying-polynomials1

Answer 3

i know it but i still don't understand it

Answer 4

Okay. Want to do it with me?

Answer 5

yea

Answer 6

I'll let @OnePieceFTW give it a shot.

Answer 7

To FOIL a binomial like this multiply the first term of each so 3x times x, then multiply the outer terms 3x times -y, then the inner terms, -4y times x, and lastly the last terms, -4y times y

Answer 8

@OnePieceFTW that sorta helps i think my problem is the subtraction within the parenthesis is what gets me

Answer 9

Alright, so 3x times -y would be -3xy. since that y is negative it makes the other term negative.

Answer 10

ooh ok that makes since.

Answer 11

@OnePieceFTW is it 3x to the 2 -7xy-4yto the 2