Elementary Algebra

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



Work Step by Step

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