Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 2 - Section 2.1 - Complex Numbers - Exercise Set: 9

Answer

$ 21 - 15i$

Work Step by Step

$-3i \times 7i - 3i \times (-5) $ $ = -21 i^2 - 15i$ $ = -21 \times (-1) -15i$ $ = 21 - 15i$
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