SOLUTION: use any method to solve the equation 7x^2-16x-28=0

Question 307133: use any method to solve the equation 7x^2-16x-28=0
Answer by Stitch(470) (Show Source): You can put this solution on YOUR website!
You can use the quadratic equatiion:

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 : .

Discriminant d=1040 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 3.44635935665673, -1.16064507094244. Here's your graph:

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