Answer
$(3+y)(3-y)$
Work Step by Step
Since $a^{2}-b^{2}=(a+b)(a-b)$, $9-y^{2}=(3+y)(3-y)$.
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter P, Prerequisites - Section P.6 - Factoring - P.6 Exercises - Page 42: 24
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