Answer
$(b)$
Work Step by Step
Let us solve the given problem in the following way:
$m^2-2m-15=0$
or, $m^2-5m+3m-15=0$
or, $(m+3)(m-5)=0$
This can be written as : $m+3=0$ or, $m-5=0$
Thus, $m=-3,5$
Hence, the final answer will be $(b)$.
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 6 - Rational Expressions and Equations - 6.1 Rational Expressions - 6.1 Exercise Set - Page 379: 8
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