Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 5 - Section 5.4 - Factoring Trinomials - Exercise Set - Page 361: 70

Answer

$2x(x+1)(5x+7)$

Work Step by Step

$ 10x^{3}+24x^{2}+14x\qquad$...factor out the common term, $2x$. $=2x(5x^{2}+12x+7)$ Two factors of $ac=+35$, whose sum is $b=+12$ are $5$ and $7$. Rewrite $12x$ as $5x+7x$ and factor in pairs. $2x(5x^{2}+12x+7)$ $=2x(5x^{2}+5x+7x+7)$ $=2x[5x(x+1)+7(x+1)]$ =$2x(x+1)(5x+7)$
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