Answer
$-3x(x+1)(x-4)$
Work Step by Step
Use: $-3x=-4x+x$
$9x^2+12x-3x^3=-3x(x^2-3x-4)=-3x(x^2-4x+x-4)=-3x[x(x-4)+1(x-4)]=-3x(x+1)(x-4)$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Prerequisites - p.4 - Factoring Polynomials - Exercises - Page 39: 60
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