SOLUTION: I have spent close to two hours trying to work out the following: 12x(squared) + 13x = 4 I have followed the rules and still am unable to solve it correctly. I've come up wi

Question 985359: I have spent close to two hours trying to work out the following:
12x(squared) + 13x = 4
I have followed the rules and still am unable to solve it correctly. I've come up with 5 incorrect solutions. I am clearly missing something.

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

Use the quadratic equation to solve

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=361 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 0.25, -1.33333333333333. Here's your graph:

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