Answer
$2$
Work Step by Step
Step 1: $(3+\sqrt 7)(3-\sqrt 7)$
Step 2: $3(3-\sqrt 7)+\sqrt 7(3-\sqrt 7)$
Step 3: $9-3\sqrt 7+3\sqrt 7-(\sqrt 7)^{2}$
Step 4: $9-7$
Step 5: $2$
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 8 - Radical Functions - 8.3 Multiplying and Dividing Radicals - 8.3 Exercises - Page 643: 35
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