Answer
$4x^2+4x+1$
Work Step by Step
Using $
(a+b)^2=a^2+2ab+b^2
$, then,
\begin{align*}
(2x+1)^2
\Rightarrow
(2x)^2+2(2x)(1)+(1)^2
\\=
4x^2+4x+1
.\end{align*}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Section 5.6 - Factoring Trinomials - Exercise Set - Page 304: 91
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