Answer
$x^{2}+8xy+16y^{2}$
Work Step by Step
$(x+4y)^{2}$
$=(x+4y)(x+4y)$
$=x(x+4y)+4y(x+4y)$
$=x^{2}+4xy+4xy+16y^{2}$
$=x^{2}+8xy+16y^{2}$
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 3 - Exponents, Polynomials and Functions - 3.2 Combining Functions - 3.2 Exercises - Page 244: 44
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