### Home > INT3 > Chapter 11 > Lesson 11.1.2 > Problem 11-20

11-20.

For each rational expression below, state any values of the variables that must be excluded (because they will make the denominator zero). Then complete each part. Homework Help ✎

Use the fact that (

*x*+ 4)^{2}= (*x*+ 4)(*x*+ 4) to rewrite. Then look for 1s and simplify. Use the strategy in part (a) to simplify the expression

.

Does anything factor out?

*x* ≠ −4 or 2

Does anything factor out?