Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 11 - Additional Topics - 11.4 - Complex Numbers - Problem Set 11.4 - Page 493: 56



Work Step by Step

There are many cases where the product of two non-real complex numbers is a real number. For example, $(1+i)(1−i)=1(1)+i−i−i^2=1−i^2=1−(−1)=1+1=2$
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