College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 1 - Section 1.4 - Quadratic Equations - 1.4 Exercises - Page 111: 6

Answer

B.

Work Step by Step

$x^2=20$ Take the square root of both sides. $x=\pm2\sqrt5$ Thus, the answer is B.
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