Answer
$45x^{2}$
Work Step by Step
Using $x^a\cdot x^b=x^{a+b}$, the given expression, $
(5x)(9x)
,$ simplifies to
\begin{array}{l}\require{cancel}
(5)(9)x^{1+1}
\\\\=
45x^{2}
.\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: 1
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