SOLUTION: Solve, x^2+18x-4=0

Question 269540: Solve,
x^2+18x-4=0
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!

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=340 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 0.219544457292887, -18.2195444572929. Here's your graph:

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