Answer
$$A=(6y-2x)(6y+2x)$$
Work Step by Step
Larger rectangle $$A=9y*4y = 36y^2$$
Smaller rectangles $$A=4*x^2 = 4x^2$$
Shaded region $$A=36y^2-4x^2 = (6y-2x)(6y+2x)$$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Review - Page 331: 90
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