Answer
$(x-3)(x^2+4)$
Work Step by Step
Regroup to obtain
$(x^3-3x^2)+(4x-12)$.
Factor out $x^2$ in the first group and $4$ in the second:
$x^2(x-3)+4(x-3)$.
Factor out $(x-3)$ to obtain
$(x-3)(x^2+4)$.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.5 - Factoring Polynomials - Exercise Set - Page 68: 12
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