Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 10 - Radical Expressions and Equations - Get Ready! - Page 611: 10



Work Step by Step

Because $(a-b)(a+b)=a^{2}-b^{2}$, so: $(3b^{2}+7)(3b^{2}-7)=(3b^{2})^{2}-7^{2}$ $=9b^{4}-49$
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