### Home > A2C > Chapter 9 > Lesson 9.1.1 > Problem 9-25

9-25.

Find *x* if 2^{p}^{(}^{x}^{)} = 4 and *p*(*x*) = *x*^{2} − 4*x* − 3. Homework Help ✎

Start by finding a common base, then substitute *p*(*x*) into the first equation and solve.

*x* = −1, *x* = 5