Intermediate Algebra: Connecting Concepts through Application

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: 35

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: $2$
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