### Home > CCA2 > Chapter 3 > Lesson 3.2.4 > Problem3-109

3-109.

If $f(x) = 3x − 9$ and $g(x) = −x^2$, find: Homework Help ✎

1. $f(−2)$

Substitute $−2$ for $x$.

$f(−2) = −15$

1. $g(-2)$

Substitute $−2$ for $x$.

$g(-2) = -(-2)^2$

$g(-2) = -4$

1. $x \text{ if } f(x) = 0$

Substitute $0$ for $f(x)$.
Solve for $x$.

1. $g(m)$

Substitute $m$ for $x$.