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: 49

Answer

$2$

Work Step by Step

Subtract each term of the subtrahend to obtain: $=-2+4i-(-4)-4i \\=-2+4i+4-4i$ Combine like terms to obtain: $=(-2+4) + (4i-4i) \\=2+0i \\=2$
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