Answer
$4n^{2}+28n+49$
Work Step by Step
$(2n+7)^{2}=$
...square the binomial.
$=(2n)^{2}+2(2n)(7)+7^{2}$
...simplify.
=$4n^{2}+28n+49$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Soecial Cases - Practice and Problem-Solving Exercises - Page 507: 12
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