SOLUTION: Can someone please help solve this using the quadratic formula ? thank you 5x^2-16x-84=0

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Question 305479: Can someone please help solve this using the quadratic formula ? thank you
5x^2-16x-84=0

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
5x^2-16x-84=0
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x=(16+-sqrt[16^2-4*5*-84])/2*5
x=(16+-sqrt[256+1,680])/10
x=(16+-sqrt[1,936)/10
x=(16+-44)/10
x=(16+44)/10
x=60/10
x=6 ans.
x=(16-44)/10
x=-28/10
x=2.8 ans.