Answer
$ x= 2±2\sqrt 2$
Work Step by Step
$x=\frac{-(-4)\sqrt{(-4)^2-4(1)(2)}}{2(1)}$
$x=\frac{4\sqrt{16-8}}{2}$
$x = \frac{4±\sqrt8}{2}$
$ x= 2±\sqrt {4⋅2}$
$ x= 2±2\sqrt 2$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 8 - Section 8.2 - The Quadratic Formula - Concept and Vocabulary Check - Page 607: 4
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