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 53: 35



Work Step by Step

Use the rule $\dfrac{a}{b} \div \dfrac{c}{d} = \dfrac{a}{b} \times \dfrac{d}{c}$ to obtain: $=\dfrac{2k+8}{6} \times \dfrac{2}{3k+12}$ Factor the binomials then cancel common factors to obtain: $\require{cancel} =\dfrac{2(k+4)}{3(2)} \times \dfrac{2}{3(k+4)} \\=\dfrac{\cancel{2}\cancel{(k+4)}}{3\cancel{(2)}} \times \dfrac{2}{3\cancel{(k+4)}} \\=\dfrac{1}{3} \times \dfrac{2}{3} \\=\color{blue}{\dfrac{2}{9}}$
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