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 5.7 - Polynomial Equations and Their Applications - Exercise Set - Page 394: 107



Work Step by Step

Plug $y=-4$,w e have $7y^2+(2k-5)y-20=0$ or, $7(-4)^2+(2k-5)(-4)-20=0$ Simplify. $-8k=112$ This implies $k=14$ Hence, the given statement is true.
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