SOLUTION: i have no idea how to even begin this problem. Any help is appreciated! Use the quadratic formula to determine the x-intercepts (if any) of the following function. Then evalu

Question 209617: i have no idea how to even begin this problem. Any help is appreciated!
Use the quadratic formula to determine the x-intercepts (if any) of the following function. Then evaluate the function for several values of x, and use the resulting points to graph the function.

f(x) = -2x2 + 2x - 9

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
f(x) = -2x2 + 2x - 9
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Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc)

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 -68 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 -68 is + or - .

The solution is , or
Here's your graph:

No x intercepts.
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