Answer
$m=-6$ or $m=-7$
Work Step by Step
$x^2+13m=-42$
$x^2+13m+42=0$
$(m+6)(m+7)=0$
$m+6=0$ or $m+7=0$
$m=-6$ or $m=-7$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 9 - Quadratic Functions and Equations - 9-4 Factoring to Solve Quadratic Equations - Practice and Problem-Solving Exercises - Page 571: 20
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