College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 1, Equations and Graphs - Section 1.5 - Complex Numbers - 1.5 Exercises: 36

Answer

$-40-42i$

Work Step by Step

$(3-7i)^{2}=(3-7i)(3-7i)=3^{2}-2(3)(7i)+(7i)^{2}=3^{2}-2(3)(7i)+7^2*-1=-40-42i$
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