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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
6*x-(1/x) = 17 // - 17
6*x-(1/x)-17 = 0
6*x-x^-1-17 = 0
6*x^1-1*x^-1-17*x^0 = 0
(6*x^2-17*x^1-1*x^0)/(x^1) = 0 // * x^2
x^1*(6*x^2-17*x^1-1*x^0) = 0
x^1
6*x^2-17*x-1 = 0
6*x^2-17*x-1 = 0
DELTA = (-17)^2-(-1*4*6)
DELTA = 313
DELTA > 0
x = (313^(1/2)+17)/(2*6) or x = (17-313^(1/2))/(2*6)
x = (313^(1/2)+17)/12 or x = (17-313^(1/2))/12
x in { (17-313^(1/2))/12, (313^(1/2)+17)/12}
x in { (17-313^(1/2))/12, (313^(1/2)+17)/12 }
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