Answer
$3x^{2}(5x-2y)(7y+x)$
Work Step by Step
$42x^{4}-99x^{3}y-15x^{2}y^{2}=3x^{2}(14x^{2}-33xy-5y^{2})$
$14x^{2}-33xy-5y^{2}=(5x-2y)(7y+x)$
$3x^{2}(5x-2y)(7y+x)$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 6 - Section 6.3 - Factoring Trinomials of the Form ax2+bx+c - Exercise Set - Page 436: 66
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