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: 105


$\sqrt 5$

Work Step by Step

$\sqrt {x^2+y^2}$ when x = 2, and y = -1. Substitute the values: $\sqrt {(2)^2+(-1)^2=}$ $\sqrt {4+1}$ Therefore, the answer is: $\sqrt 5.$
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