### Home > AC > Chapter 5 > Lesson 5.1.4 > Problem 5-40

5-40.

Rena says that if , the equation below is true. Her friend, Dean, says the answer is

*. Who is correct?*

**Justify**your conclusion.

Substitute both numbers in for and see which one makes the statement true.

For example, if Joe said :

False!

Now try with the given possible values.