Answer
$x=4$ or $x=9$
Work Step by Step
$x^{2}-13x=-36$
Adding $36$ to both sides, $x^{2}-13x+36=-36+36$.
Simplifying, $x^{2}-13x+36=0$.
$x^{2}-4x-9x+36=0$
$x(x-4)-9(x-4)=0$
$(x-4)(x-9)=0$
$(x-4)=0$ or $(x-9)=0$
$x=4$ or $x=9$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 6 - Cumulative Review - Page 481: 50
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