Answer
$x^2-9y^2$
Work Step by Step
$(x+3y)(x-3y)$
This can be written as the difference of two squares:
$x^2-9y^2$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter R - Section R.5 - Polynomials - R.4 Assess Your Understanding - Page 49: 80
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