### 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

to rewrite . Then look for s and simplify. Does anything factor out?

orUse the strategy in part (a) to simplify the expression

. Does anything factor out?