Answer
$x= 3,-12$.
Work Step by Step
We solve by factoring as follows:
$$
x^2+9x-36=0\Longrightarrow (x-3)(x+12)=0
$$
that is
$x-3=0$ or $x+12=0$
and so
$x= 3,-12$.
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 11 - Test - Page 380: 3
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