Answer
$(a^2-8)(a^2+6)$
Work Step by Step
$a^4-2a^2-48$
$u=a^2$ and substitute
$u^2-2a-48$
factor using FOIL method
$(u-8)(u+6)$
replace u with $a^2$
$(a^2-8)(a^2+6)$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter R - Review of Basic Concepts - R.4 Factoring Polynomials - R.4 Exercises - Page 44: 92
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