Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 7 - Section 7.1 - Simplifying Rational Expressions - Exercise Set: 4



Work Step by Step

$\dfrac{z}{z^{2}-5};$ $z=-5$ Replace $z$ with $-5$ and evaluate the operations: $\dfrac{-5}{(-5)^{2}-5}=\dfrac{-5}{25-5}=\dfrac{-5}{20}=-\dfrac{1}{4}$
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