SOLUTION: How do you solve this quadratic equation 2x^2+8x-1=0?

Question 230806: How do you solve this quadratic equation 2x^2+8x-1=0?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
The quadratic equation is one way, and it always works. Other methods work some of the time.

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 : .

Discriminant d=72 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 0.121320343559642, -4.12132034355964. Here's your graph:

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