Answer
$64x^2+240xy+225y^2$
Work Step by Step
$(8x+15y)^2=(8x)^2+2(8x)(15y)+(15y)^2=64x^2+240xy+225y^2$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 5 - Trigonometric Functions - Section 5.6 Phase Shift; Sinusoidal Curve Fitting - 5.6 Assess Your Understanding - Page 454: 43
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