Algebra: A Combined Approach (4th Edition)

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

Chapter 10 - Section 10.4 - Adding, Subtracting, and Multiplying Radical Expressions - Practice: 4

Answer

$20\sqrt 2$

Work Step by Step

Step 1: $\sqrt 50 + 5\sqrt 18$ Step 2: $\sqrt (2\times25) + 5\sqrt (2\times9)$ Step 3: $\sqrt 2\sqrt 25 + 5\sqrt 2\sqrt 9$ Step 4: $5\sqrt 2 + 5\sqrt 9\sqrt 2$ Step 5: $5\sqrt 2 + (5\times3)\sqrt 2$ Step 6: $5\sqrt 2 + 15\sqrt 2$ Step 7: $20\sqrt 2$
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