### Home > A2C > Chapter 11 > Lesson 11.2.3 > Problem 11-77

11-77.

log(*x*^{2} + 21*x*) = 2

*x*^{2} + 21*x* = 10^{2}

(*x* − 4)(*x* + 25) = 0

4

3

See parts (a) and (b).

11-77.

log(*x*^{2} + 21*x*) = 2

*x*^{2} + 21*x* = 10^{2}

(*x* − 4)(*x* + 25) = 0

4

3

See parts (a) and (b).