Answer
-.5
Work Step by Step
$2x^2-13x-7=0$
$-b+\sqrt {b^2-4ac}/2a$
$13+\sqrt{13^2-4*2*-7}/2*2$
$13+\sqrt{169+56}/4$
$13+sqrt{225}/4$
$13+15/4$
$28/4 = 7$
$13-15/4$
$-2/4 =- .5$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-4 Factoring to Solve Quadratic Equations - Standardized Test Prep - Page 559: 46
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