Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 6 - Factoring, Solving Equations, and Problem Solving - 6.2 - Factoring the Difference of Two Squares - Problem Set 6.2 - Page 248: 20



Work Step by Step

Factoring out the greatest common factor of 2x, the given expression, $ 2x^3-2x ,$ is equivalent to \begin{array}{l}\require{cancel} 2x(x^2-1) .\end{array} Using $a^2-b^2=(a+b)(a-b)$, the completely factored form of the expression above is \begin{array}{l}\require{cancel} 2x(x+1)(x-1) .\end{array}
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