Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 7 - Section 7.4 - Adding and Subtracting Radical Expressions - 7.4 Exercises - Page 465: 6

Answer

-4

Work Step by Step

$\sqrt 25-\sqrt 81=\sqrt (5\times5)-\sqrt (9\times9)=5-9=-4$
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