Answer
$7x^4$
Work Step by Step
We start with the given expression: $\frac{21x^3}{3x^{-1}}$
We divide the constants: $7\frac{x^3}{x^{-1}}$
To divide powers with the same base, we subtract the exponents: $7x^{3-(-1)}=7x^4$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 7 - Exponents and Exponential Functions - Chapter Review - 7-5 Division Properties of Exponents - Page 465: 41
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