Intermediate Algebra: Connecting Concepts through Application

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

Chapter 3 - Exponents, Polynomials and Functions - Chapter Test: 25

Answer

$(2m-9)(6m+11n)$

Work Step by Step

$\bf{\text{Solution Outline:}}$ To factor the given expression, $ 12m^2-54m+22mn-99n ,$ group the terms such that the factored form of the groupings will result to a factor that is common to the entire expression. Then, factor the $GCF$ in each group. Finally, factor the $GCF$ of the entire expression. $\bf{\text{Solution Details:}}$ Grouping the first and second terms and the third and fourth terms, the given expression is equivalent to \begin{array}{l}\require{cancel} (12m^2-54m)+(22mn-99n) .\end{array} Factoring the $GCF$ in each group results to \begin{array}{l}\require{cancel} 6m(2m-9)+11n(2m-9) .\end{array} Factoring the $GCF= (2m-9) $ of the entire expression above results to \begin{array}{l}\require{cancel} (2m-9)(6m+11n) .\end{array}
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