### Home > CCA2 > Chapter 8 > Lesson 8.3.2 > Problem 8-163

8-163.

For homework, Londa was asked to simplify the expression

Show Londa the steps she could take to get

.

What steps do you think Londa took to get

as a result? Look at the negative signs.

What does she need to consider to avoid making this mistake in the future?

Convert to imaginary form before completing operations.

Londa's example means that it is not always true that

and. What restriction needs to be placed on the numbersand?They must be non-negative real numbers.