Answer
$m= \pm 9$
Work Step by Step
$m^2=81$
$m^2-81=0$
$(m-9)(m+9)=0$
$m=\pm 9$
The equation has two solutions, $m= \pm 9$
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 - Mid-Chapter Quiz - Page 575: 13
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