SOLUTION: How would I use the quadratic formula to solve 3x^2-6x-7=0?

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Question 574673: How would I use the quadratic formula to solve 3x^2-6x-7=0?
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
How to use the quadratic formula x+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F2afor solving:
3x%5E2-6x-7+=+0
First, identify a, b, and c from the quadratic equation.
These come from the general form: ax%5E2%2Bbx%2Bc+=+0 so in your problem, a = 3, b = -6, and c = -7.
Substitute these values into the formula:
x+=+%28-%28-6%29%2B-sqrt%28%28-6%29%5E2-4%283%29%28-7%29%29%29%2F2%283%29 Simplify this.
x+=+%286%2B-sqrt%2836-%28-84%29%29%29%2F6 Evaluate.
x+=+%286%2B-sqrt%28120%29%29%2F6
x+=+6%2F6+%2Bsqrt%28120%29%2F6 or 6%2F6-sqrt%28120%29%2F6
x+=+1%2B1.826 or x+=+1-1.826
x+=+2.826 or x+=+-0.826