Answer
$8a^2+2ab+4ay+by$
Work Step by Step
Using the FOIL method, the given expression, $
(2a+y)(4a+b)
,$ is equivalent to
\begin{array}{l}\require{cancel}
2a(4a)+2a(b)+y(4a)+y(b)
\\\\=
8a^2+2ab+4ay+by
.\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 R - Elementary Algebra Review - R.4 Polynomials - R.4 Exercise Set - Page 961: 53
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