Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 8 - Test - Page 659: 8

Answer

Two imaginary solutions.

Work Step by Step

Add $-4x+8$ to both sides of the given equation. $\Rightarrow x^2-4x+8=4x-8-4x+8$ Simplify. $\Rightarrow x^2-4x+8=0$ The standard form of the quadratic equation $\Rightarrow a^2+bx+c=0$ By comparing both equations we identify $a=1,b=-4$ and $c=8$ The discriminant for the standard form is $b^2-4ac$. Plug all values. $=(-4)^2-4(1)(8)$ Simplify. $=16-32$ $=-16$. The discriminant is a negative number. Hence, the solutions are two imaginary numbers.
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