Answer
$9(2x+3)(2x-3)$
Work Step by Step
$36x^2-81=9(4x^2)-9(9)=9(4x^2-9)=9[(2x)^2-3^2]=9(2x+3)(2x-3)$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Prerequisites - Review Exercises - Page 64: 84
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