Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 8 - Radical Functions - 8.5 Complex Numbers - 8.5 Exercises: 53

Answer

$13+84i$

Work Step by Step

$(7+6i)(7+6i)$ =$7(7+6i)+6i(7+6i)$ =$49+42i+42i+36i^{2}$ =$49+84i+36(-1)$ =$49-36+84i$ =$13+84i$
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