### Home > CCA2 > Chapter 8 > Lesson 8.1.1 > Problem8-23

8-23.

Find $x\ \text{if}\ 2^{p(x)} = 4$ and $p\left(x\right) = x^{2} − 4x − 3$.

Since $4 = 2^2$, what does $p\left(x\right)$ have to equal?

$x = −1, x = 5$