Answer
$21x^{3}$
Work Step by Step
Using $x^a\cdot x^b=x^{a+b}$, the given expression, $
(3x^2)(7x)
,$ simplifies to
\begin{array}{l}\require{cancel}
(3)(7)x^{2+1}
\\\\=
21x^{3}
.\end{array}
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 5 - Exponents and Polynomials - 5.2 - Multiplying Monomials - Problem Set 5.2 - Page 200: 3
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