Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.5 Rational Expressions - R.5 Exercises - Page 54: 79

Answer

$\frac{m^3-4m-1}{m-2}$

Work Step by Step

Step 1. Perform operations to the numerator: $m-\frac{1}{m^2-4}=\frac{m^3-4m-1}{m^2-4}=\frac{m^3-4m-1}{(m+2)(m-2)}$ Step 2. Use the above result in the original expression, we have: $\frac{m-\frac{1}{m^2-4}}{\frac{1}{m+2}}=\frac{\frac{m^3-4m-1}{(m+2)(m-2)}}{\frac{1}{m+2}}=\frac{m^3-4m-1}{(m+2)(m-2)}\cdot \frac{m+2}{1}=\frac{m^3-4m-1}{m-2}$
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