Exercise 68 Page 317

Using the function $g(x),$ we want to evaluate for the given value, $g(\text{-}8).$ To do this, we need to substitute $\text{-}8$ for $x$ in each instance of the $x\text{-}$variable.

$g(x)=\text{-}{x}^2$

Substitute

$x=\text{-}8$

$g(\text{-}8)=\text{-}{\left(\text{-}8\right)}^2$

NegBaseToPosBase

$(\text{-}a{)}^2=a^2$

$g(\text{-}8)=\text{-}{8}^2$

CalcPow

Calculate power

$g(\text{-}8)=\text{-}64$