Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 10 - Section 10.7 - Complex Numbers - Exercise Set: 49

Answer

$2$

Work Step by Step

$(1 - i)(1 + i) = 1 - i + i - i^2 = 1 - (-1) = 2$
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