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5*x^2-x^2-(39*x)-(8/64) = 0
5*x^2-x^2-39*x-1/8 = 0
4*x^2-39*x-1/8 = 0
DELTA = (-39)^2-(-1/8*4*4)
DELTA = 1523
DELTA > 0
x = (1523^(1/2)+39)/(2*4) or x = (39-1523^(1/2))/(2*4)
x = (1523^(1/2)+39)/8 or x = (39-1523^(1/2))/8
x in { (39-1523^(1/2))/8, (1523^(1/2)+39)/8 }
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