Question

Reviewing and need some refreshment help.
Simplify: (8x^2+3x-9)-2(4x^2-8x+3)

Answer 1

Any ideas?

Answer 2

fix the second equation first?

Answer 3

Yeah you distribute it what do you get?

Answer 4

(8x^2-16x+6)

Answer 5

Good, now use the first part subtract the second part
(8x^2+3x-9)-(8x^2-16x+6)

Answer 6

so next it would be (3x-9)-(-16x+6)?

Answer 7

Nope, you subtract it like this
\[(\color{red}{8x^2}\color{green}{+3x} \color{blue}{-9})-(\color{red}{8x^2} \color{green}{-16x} \color{blue}{+6})\]
\[\color{red}{8x^2-8x^2=0} \\ \\ \color{green}{3x-(-16x)=19x} \\ \\ \color{blue}{-9-6=-15}\]
You get
\[19x-15\]

Answer 8

Still got the same answer but i understand (: so would i find x to simplify or leave it like that?

Answer 9

It says \(Simplify\) so you just leave it like this