Answer
$3x^{2}(x+2)(x-2)$
Work Step by Step
$ 3x^{4}-12x^{2}\quad $ ... factor out $3x^{2}$
$=3x^{2}(x^{2}-4)$
The parentheses hold a difference of squares, $ x^{2}-2^{2}$, thus:
$=3x^{2}(x+2)(x-2)$
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 - Review Exercises - Page 143: 101
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