Answer
a. $x(2x+7)(2x-7)$
b. $2(9x^2+1)(3x+1)(3x-1)$
Work Step by Step
a.
$4x^3-49x$
$=x(4x^2-49)$
$=x(2x+7)(2x-7)$
b.
$162x^4-2$
$=2(81x^4-1)$
$=2(9x^2+1)(9x^2-1)$
$=2(9x^2+1)(3x+1)(3x-1)$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 9 - Cumulative Review - Page 677: 27
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