Answer
$-20-8i$
Work Step by Step
We first use the distributive property to simplify. Then, we combine like terms to obtain:
$(-10-4i)-(10+4i)$
=$-10-4i-10-4i$
=$-10-10-4i-4i$
=$-20-8i$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 11 - Additional Topics - 11.4 - Complex Numbers - Problem Set 11.4 - Page 493: 29
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