Answer
$7a^2+8a$
Work Step by Step
By combining like terms, the given expression, $
5a+7a^2+3a
$, simplifies to
\begin{array}{l}
7a^2+(5a+3a)
\\\\=
7a^2+8a
.\end{array}
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 4 - Polynomials - 4.3 Polynomials - 4.3 Exercise Set - Page 252: 42
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