Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Appendix A - Exercise Set - Page 976: 43



Work Step by Step

Using the product of sum and difference of two terms $(a+b)(a-b)=a^{2}-b^{2}$, $(3b-6y)(3b+6y)=(3b)^{2}-(6y)^{2}=9b^{2}-36y^{2}$.
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