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: 3

Answer

C.

Work Step by Step

$x^2+5=0$ Subtract 5 from both sides. $x^2=-5$ Take the square root of both sides. Remember that $\sqrt{-1}=i$. $x=\pm{i}\sqrt5$ Thus, the answer is C.
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