Answer
$4x^2+12x+9$
Work Step by Step
$$(2x+3)^2$$ $$=(2x+3)(2x+3)$$ $$=(2x\times 2x)+(2x\times 3)+(3\times 2x)+(3\times 3)$$ $$=4x^2+6x+6x+9$$ $$=4x^2+12x+9$$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.4 - Page 61: 43
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