Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 6 - Section 6.2 - Adding and Subtracting Rational Expressions - Exercise Set: 96

Answer

The error is that the $LCD$ should be $x+7$ and not $(x+7)^2$; $\dfrac{-x+4}{x+7}$

Work Step by Step

The error is that the $LCD$ should be $x+7$ and not $(x+7)^2$. The correct solution is \begin{array}{l}\require{cancel} \dfrac{7-(x+3)}{x+7} \\\\= \dfrac{7-x-3}{x+7} \\\\= \dfrac{-x+4}{x+7} .\end{array}
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