### Home > PC > Chapter 1 > Lesson 1.3.1 > Problem 1-99

1-99.

Given *f*(*x*) = *x*^{2} + 2*x*, solve for *x* where *f*(*x* + 2) = 0. Homework Help ✎

Substitute (*x* + 2) for every *x* in the *f*(*x*) function.

Remember the middle term when you expand (*x* + 2)^{2}.