Answer
$\frac{-125n^{12}}{r^2}$
Work Step by Step
The rules $(\frac{a}{b})^n = \frac{a^n}{b^n}$, $(a^m)^n = a^{mn}$.
$\frac{(-5n^4)^3}{r^2} = \frac{(-5)^3 n^{4\times3}}{r^2} = \frac{-125n^{12}}{r^2}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter R - Review of Basic Concepts - R.3 Polynomials - R.3 Exercises - Page 32: 32
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