Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 6 Rational Exponents and Radical Functions - Prerequisite Skills - Page 412: 1

Answer

$$\pm 9$$

Work Step by Step

Taking the square root and considering both the positive and negative answers: $$\sqrt{81} = \pm9$$
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