### Home > MC2 > Chapter 3 > Lesson 3.1.2 > Problem 3-22

3-22.

Simplify the following expressions.

You must find a common denominator before you can combine these terms.

A common denominator is often a multiple of both denominators of both fractions that are to be combined. A good one to use for this expression would be

.

Now combine and simplify the entire expression.

Refer to part (a).