SOLUTION: solve the following quadratic equation by using formula 3x²-4x-5=0 ? can I also be shown a checking method to show that my answer is correct

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Question 1029452: solve the following quadratic equation by using formula
3x²-4x-5=0 ?
can I also be shown a checking method to show that my answer is correct
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
solve the following quadratic equation by using formula
3x²-4x-5=0
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=76 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 2.11963298118022, -0.786299647846891. Here's your graph:

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can I also be shown a checking method to show that my answer is correct
-----------
Sub the solutions in the equation.
It if's = 0, it's correct.
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