SOLUTION: Would you pls help me with this? Solve using quadratic formula: 6x^2 + 7x - 11 = 0 I started like this: x= {-7+-sqrt(7^2-4*66)}/ 12 I would like to know how to do it step b

Question 621635: Would you pls help me with this?
Solve using quadratic formula: 6x^2 + 7x - 11 = 0
I started like this:

x= {-7+-sqrt(7^2-4*66)}/ 12
I would like to know how to do it step by step because I want to be able to do the others by myself.

Thanks a lot.

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

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=313 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 0.890983834412844, -2.05765050107951. Here's your graph:

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