Answer
$5x^3$ and $(5x)^3$ are not equivalent expressions because $(5x)^3=125x^3$.
Work Step by Step
RECALL:
$(ab)^m=a^mb^m$
Thus,
$(5x)^3=5^3x^3=125x^3$
Therefore, $5x^3$ and $(5x)^3$ are not equivalent expressions.
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 - Review Exercises: Chapter 4 - Page 299: 73
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