Answer
$4\rightarrow C$
Work Step by Step
$x^{2}+2yx+y^{2}=\left( x+y\right) ^{2}\Rightarrow 4\rightarrow C$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 7 - Trigonometric Identities and Equations - 7.2 Verifying Trigonometric Identities - 7.2 Exercises - Page 666: 4
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