SOLUTION: Solve. Try factoring first. If factoring is not possible or is difficult, use the quadratic formula. 2x^2 + 8 = -1

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Question 173804This question is from textbook Introductory Algebra
: Solve. Try factoring first. If factoring is not possible or is difficult, use the quadratic formula.
2x^2 + 8 = -1 This question is from textbook Introductory Algebra

Answer by vleith(2983)   (Show Source): You can put this solution on YOUR website!


no easy factoring there
Solved by pluggable solver: SOLVE quadratic equation with variable
Quadratic equation (in our case ) has the following solutons:



For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

The discriminant -72 is less than zero. That means that there are no solutions among real numbers.

If you are a student of advanced school algebra and are aware about imaginary numbers, read on.


In the field of imaginary numbers, the square root of -72 is + or - .

The solution is

Here's your graph:
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