College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter R - Section R.2 - Algebra Essentials - R.2 Assess Your Understanding - Page 28: 103



Work Step by Step

RECALL: For a positive real number $a$: $\sqrt{a^2}=a$ Substitute $2$ in for $x$ to obtain: $=\sqrt{2^2}$ Use the rule above to obtain: $\sqrt{2^2}=2$
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