Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 6 - Section 6.1 - Rational Expressions and Functions; Multiplying and Dividing - 6.1 Exercises: 55

Answer

$-(x+y)$

Work Step by Step

$\frac{x^{2}-y^{2}}{y-x}=\frac{(x+y)(x-y)}{y-x}=\frac{(x+y)(x-y)}{-(x-y)}=\frac{x+y}{-1}\times\frac{x-y}{x-y}=-(x+y)\times1=-(x+y)$
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