Answer
x=-5/4, x=9
Work Step by Step
$4x^2-31x-45=0$
Factor
(4x+5)(x-9)=0
Set all factors equal to 0
4x+5=0 x-9=0
Isolate the variable to solve
x=-5/4, x=9
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 4 - Quadratic Functions - 4.5 Solving Equations by Factoring - 4.5 Exercises - Page 359: 39
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