Answer
$-12-16i$
Work Step by Step
We combine like terms to obtain:
$(-4-7i)+(-8-9i)$
$=-4-7i-8-9i$
$=-4-8-7i-9i$
$=-12-16i$
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: 23
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