Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 6 - Rational Expressions and Equations - 6.4 Addition and Subtraction with Unlike Denominators - 6.4 Exercise Set - Page 402: 89

Answer

You could factor.

Work Step by Step

In order to convince someone these are opposites, factor a negative out of the denominator of the second fraction. Since this will yield a fraction that is the same as the first one except it is multiplied by -1, it will become clear that these are opposites.
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