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: 63

Answer

$13$

Work Step by Step

$(2 - 3i)(2+3i) = 4 +6i - 6i - 9i^2 = 4 - 9(-1) = 13$
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