SOLUTION: i need to solve this equation 7x squared + 2x-2=0 bye using the quadradic formula

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Question 42155: i need to solve this equation 7x squared + 2x-2=0 bye using the quadradic formula
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Okay, from
7x^2 + 2x - 2 = 0, we have
x = (-2 ± sqrt(4 - 4*7*(-2))) / 14
x = (-2 ± sqrt(4 + 56)) / 14
x = (-2 ± sqrt(60)) / 14
x = (-2 ± 2*sqrt(15)) / 14
x = (-1 ± sqrt(15)) / 7