Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 7 - Section 7.7 - Complex Numbers - Exercise Set - Page 571: 138

Answer

False.

Work Step by Step

The given expression is $=(3+7i)(3-7i)$ Use the special formula $(A+B)(A-B)=A^2-B^2$. $=(3)^2-(7i)^2$ Simplify. $=9-49i^2$ Use $i^2=-1$. $=9+49$ Simplify. $=58$ Hence, the given statement is false.
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