Intermediate Algebra (6th Edition)

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

Chapter 8 - Cumulative Review - Page 534: 23

Answer

$\dfrac{xy+2x^3}{y-1}$

Work Step by Step

The factored form of the given expression, $ \dfrac{x^{-1}+2xy^{-1}}{x^{-2}-x^{-2}y^{-1}} ,$ is \begin{array}{l}\require{cancel} \dfrac{\dfrac{1}{x}+\dfrac{2x}{y}}{\dfrac{1}{x^2}-\dfrac{1}{x^2y^1}} \\\\= \dfrac{\dfrac{y+2x^2}{xy}}{\dfrac{y-1}{x^2y}} \\\\= \dfrac{y+2x^2}{xy}\div\dfrac{y-1}{x^2y} \\\\= \dfrac{y+2x^2}{xy}\cdot\dfrac{x^2y}{y-1} \\\\= \dfrac{y+2x^2}{\cancel{xy}}\cdot\dfrac{\cancel{xy}\cdot x}{y-1} \\\\= \dfrac{xy+2x^3}{y-1} .\end{array}
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