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 572: 140

Answer

True.

Work Step by Step

$(x+yi)(x-yi)=x^2-xyi+xyi-y^2i^2=x^2+y^2$. Thus the statement is true.
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