Answer
$7+6i$
Work Step by Step
Writing the two expressions within the parenthesis together as one large expression and then combining like terms, we obtain:
$(12+7i)-(5+i)$
$=12+7i-5-i$
$=12-5+7i-i$
$=7+6i$
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: 18
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