Algebra: A Combined Approach (4th Edition)

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

Chapter 7 - Review: 4



Work Step by Step

$\dfrac{x^{2}+xy-y^{2}}{x+y};$ $x=5;$ $y=7$ Substitute $x$ with $5$ and $y$ with $7$ and simplify: $\dfrac{5^{2}+(5)(7)-7^{2}}{5+7}=\dfrac{25+35-49}{12}=\dfrac{11}{12}$
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