#### Answer

$\dfrac{11}{12}$

#### 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:
$\dfrac{5^{2}+(5)(7)-7^{2}}{5+7}=\dfrac{25+35-49}{12}=\dfrac{11}{12}$

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$\dfrac{11}{12}$

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