Answer
$\sqrt 5$
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:
$\sqrt 5.$
College Algebra (10th Edition)
by Sullivan, Michael
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
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