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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x-(6/x)-1 = 5/12 // - 5/12
x-(6/x)-(5/12)-1 = 0
x-6*x^-1-5/12-1 = 0
1*x^1-6*x^-1-17/12*x^0 = 0
(1*x^2-17/12*x^1-6*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2-17/12*x^1-6*x^0) = 0
x^1
x^2+(-17/12)*x-6 = 0
x^2+(-17/12)*x-6 = 0
DELTA = (-17/12)^2-(-6*1*4)
DELTA = 3745/144
DELTA > 0
x = ((3745/144)^(1/2)-(-17/12))/(1*2) or x = (-(-17/12)-(3745/144)^(1/2))/(1*2)
x = ((3745/144)^(1/2)+17/12)/2 or x = (17/12-(3745/144)^(1/2))/2
x in { (17/12-(3745/144)^(1/2))/2, ((3745/144)^(1/2)+17/12)/2}
x in { (17/12-(3745/144)^(1/2))/2, ((3745/144)^(1/2)+17/12)/2 }
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