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:
$=(-2+4) + (4i-4i)
\\=2+0i
\\=2$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
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 - Page 112: 49
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