Answer
$-b^{-1}$
Work Step by Step
Given: $-b^7(b^8)^{-1}$
Firstly multiply the power exponents and then add the exponents of the same base term.
$-b^7(b^8)^{-1}=-b^7(b^{-8})$
$=-b^{-1}$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-5 Completing the Square - Mixed Review - Page 566: 61
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