Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 9 - Roots and Radicals - Chapters 1-9 Cumulative Review Problem Set: 46

Answer

$11$

Work Step by Step

Using the rule $(a+b)(a-b)=a^{2}-b^{2}$, we obtain: $(3\sqrt 2-\sqrt 7)(3\sqrt 2+\sqrt 7)$ =$(3\sqrt 2)^{2}-(\sqrt 7)^{2}$ =$(3)^{2}(\sqrt 2)^{2}-(\sqrt 7)^{2}$ =$(9)(2)-(7)$ =$18-7$ =$11$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.