College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter R - Section R.7 - Rational Expressions - R.7 Assess Your Understanding - Page 72: 86

Answer

The simplified expression is $\dfrac{3x+2}{x-1}$.

Work Step by Step

The given expression can be simplified as follows: $\dfrac{4(x+2)^{-1}-3}{3(x+2)^{-1}-1}$ $=\dfrac{4(x+2)^{-1}-3}{3(x+2)^{-1}-1}\cdot \dfrac{x+2}{x+2}$ $=\dfrac{(4(x+2)^{-1}-3)(x+2)}{(3(x+2)^{-1}-1)(x+2)}$ $=\dfrac{4(x+2)^{-1}(x+2)-3(x+2)}{3(x+2)^{-1}(x+2)-(x+2)}$ $=\dfrac{4-3(x+2)}{3-(x+2)}$ $=\dfrac{4-3x-6}{3-x-2}$ $=\dfrac{-3x-2}{1-x}$. Thus, the simplified expression is $\dfrac{3x+2}{x-1}$.
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