### Home > PC > Chapter 11 > Lesson 11.1.3 > Problem 11-48

11-48.

Multiply each of the following complex numbers. Recall that

*i*=and *i*^{2}= −1. Homework Help ✎(3 + 2

*i*) (3 − 2*i*)What does

+ 7 *i*need to be multiplied by so that the result will be a whole number?What does

*a*+*bi*need to be multiplied by so that the result will be a whole number?

13

Did you remember to use the Distributive Property?

The answers for parts (a) and (b) are both whole numbers. How are the factors being multiplied the same or different?