Answer
$=-b^{-1}$
Work Step by Step
Applying the rules of exponents:
$-b^7(b^8)^{-1}$
$=-b^7b^{8\times(-1)}$
$=-b^{7+(-8)}$
$=-b^{-1}$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 9 - Quadratic Functions and Equations - 9-5 Completing the Square - Practice and Problem-Solving Exercises - Page 581: 61
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