Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 1 - 1.5 - Complex Numbers - 1.5 Exercises - Page 119: 35


$(\sqrt 2+3i)(\sqrt 2-3i)=11$

Work Step by Step

$(\sqrt 2+3i)(\sqrt 2-3i)=(\sqrt 2)^2-(3i)^2=2-3^2i^2=2-9(-1)=2+9=11$
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