Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 7 - Rational Functions - 7.2 Simplifying Rational Expressions - 7.2 Exercises - Page 575: 37

Answer

$\frac{6x^2-x-35}{2x-5}= 3x+7$

Work Step by Step

Given $$\frac{6x^2-x-35}{2x-5}.$$ Amy did not properly distribute the negative through the binomial on the second step. The binomial, $-6x^2-15x$ should have been $-6x^2+15x$. Here is the correction. $$ \begin{array}{r} 3x+7\phantom{)} \\ 2x-5{\overline{\smash{\big)}\,6x^2-x-35\phantom{)}}}\\ \underline{-~\phantom{(}(6x^2-15x)\phantom{-b)}}\\ 0+14x-35\phantom{)}\\ \underline{-~\phantom{()}(14x-35)}\\ 0\phantom{)} \end{array} $$ The solution is: \begin{equation} \begin{aligned} \frac{6x^2-x-35}{2x-5}&= 3x+7. \end{aligned} \end{equation}
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