1. ## f(x) problem

f(x)= 2x^2+4x+2

if f(-x) I got 2x+2 what did I do wrong? What is -x ^2?

2. Hi rj2001,

I don't thoroughly understand your question......

If we have $f(x)=2x^2+4x+2$ then $f(-x)=2(-x)^2+4(-x)+2=2x^2-4x+2$ .

Hope this helps.

3. Yes

f(x)=2x^2+4x+2

now if f(x+h) is plugged in to above what would that be?

4. $2(x + h)^2 + 4(x + h) + 2 =$

$2(x^2 + 2xh + h^2) + 4(x + h) + 2 =$

$2x^2 + 4xh + 2h^2 + 4x + 4h + 2 =$

$2x^2 + (4h + 4)x + (2h^2 + 4h + 2)$