Question

(x+1)(ax^2+bx+c) which is equal to ax^3 +(b+a)x^2+(c+b)x+c can someonw explain me me how that come about? thanks!

Answer 1

use the distributive property

Answer 2

Multipy every thing through by x, multiply through by one. Add the two together.

Answer 3

\[ax ^{3}+(ax ^{2}+bx ^{2})+(bx+cx)+c\]They skipped this step, factoring.

Answer 4

oh i see and then they just factor the ( ) together or somthing

Answer 5

Yes, they pull out b+a in the first bracket and c+b in the second.

Answer 6

thanks