Answer
$9x^2+36x+35$
Work Step by Step
Using $(a+b)(c+d)=ac+ad+bc+bd$ or the FOIL Method, the given expression, $
(3x+5)(3x+7)
$, is equivalent to
\begin{array}{l}\require{cancel}
9x^2+21x+15x+35
\\\\=
9x^2+36x+35
.\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Section 5.4 - Multiplying Polynomials - Exercise Set - Page 290: 109b
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