Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - Chapter 1 Test Prep - Review Exercises - Page 178: 25



Work Step by Step

$\left( 5-11i\right) \left( 5+11i\right) =5^{2}-\left( 11i\right) ^{2}=25-121i^{2}=25-121\times \left( -1\right) =25+121=146$
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