SOLUTION: use the quadratic formula to solve equation 3x(2squared)-30x-180=0

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Question 400138: use the quadratic formula to solve equation 3x(2squared)-30x-180=0
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

solving using the quadratic formula

 3x^2-30x-180=0

3(x^2 -10x-60) = 0

x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+

x+=+%2810+%2B-+sqrt%28+340+%29%29%2F%282%29+

x+=+%2810+%2B-+sqrt%28+4%2A85+%29%29%2F%282%29+

x+=+5+%2B-+1%2Asqrt%28+85+%29+

x = {14.2195, -4.2195}