Answer
$u=-2$ or $u=\frac{5}{2}$
Work Step by Step
$2u^2-u-10=2u^2+4u-5u-10=2u(u+2)-5(u+2)=(u+2)(2u-5)=0$
Thus $u=-2$ or $u=\frac{5}{2}$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 8 - Section 8.3 - Quadratic Functions and Their Graphs - Exercise Set - Page 629: 100
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