Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 7 - Exponents and Exponential Functions - 7-3 More Multiplication Properties of Exponents - Lesson Check: 2

Answer

$1/b^{21}$.

Work Step by Step

When a power is raised to a power, we multiply the two powers. Thus, we multiply -7 and 3 to obtain that the expression simplifies to $b^{-21}$. However, because -21 is negative, we put it in the denominator of the fraction, obtaining that this simplifies to: $1/b^{21}$.
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