Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - 1.3 Complex Numbers - 1.3 Exercises: 61

Answer

$10$

Work Step by Step

$(3 - i)(3+i) = 9 +3i - 3i - i^2 = 9 - (-1) = 10$
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