Answer
$20x^2+5x$
Work Step by Step
Using $a(b+c)=ab+ac$ or the Distributive Property, the given expression, $
5x(4x+1)
$, is equivalent to
\begin{array}{l}\require{cancel}
5x(4x)+5x(1)
\\\\=
20x^2+5x
.\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 - 4.5 Multiplication of Polynomials - 4.5 Exercise Set - Page 268: 27
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