Answer
4ab
Work Step by Step
$(a+b)^{2}-(a-b)^{2}=[(a+b)-(a-b)][(a+b)+(a-b)]=(2b)(2a)=4ab$
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 43: 99
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