Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 6 - Review: 89

Answer

$x =- \frac{7}{2}$ or $x=4$

Work Step by Step

$2x^2 - x - 28 = 0$ $2x^2 - 8x + 7x - 28 = 0$ $2x(x - 4) + 7(x - 4) = 0$ $(2x+7) (x-4) = 0$ Therefore $2x + 7 = 0$ or $x- 4 =0$ $2x = -7$ or $x=4$ $x =- \frac{7}{2}$ or $x=4$
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