Answer
$-\frac{19}{42}$
Work Step by Step
Use the property $(-1)(-1)=1$, we have $\frac{(-7)(-3)-(-2^3)(-5)}{(-2^2-2)(-1-6)}=\frac{(21)-(-8)(-5)}{(-4-2)(-7)}=\frac{(21)-(40)}{(-6)(-7)}=\frac{(-19)}{(42)}=-\frac{19}{42}$
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 - Chapter R Test Prep - Review Exercises - Page 83: 48
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