Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 6 - Section 6.3 - Complex Rational Expressions - Exercise Set - Page 435: 11

Answer

$-\frac{1}{x(x+5)}$.

Work Step by Step

The given expression is $=\frac{\frac{1}{x+5}-\frac{1}{x}}{5}$ Multiply the numerator and the denominator by $x(x+5)$. $=\frac{x(x+5)}{x(x+5)}\cdot \frac{\frac{1}{x+5}-\frac{1}{x}}{5}$ Use the distributive property. $=\frac{x(x+5)\cdot \frac{1}{(x+5)}-x(x+5)\cdot\frac{1}{x}}{5x(x+5)}$ Simplify. $=\frac{x-(x+5)}{5x(x+5)}$ $=\frac{x-x-5}{5x(x+5)}$ $=\frac{-5}{5x(x+5)}$ $=-\frac{1}{x(x+5)}$.
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