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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3*x-1)/x-2 = 3*x+6/x+3 // - 3*x+6/x+3
(3*x-1)/x-(3*x)-(6/x)-3-2 = 0
(3*x-1)/x-3*x-6*x^-1-3-2 = 0
(3*x-1)/x-3*x-6/x-3-2 = 0
(3*x-1)/x+(-3*x*x)/x-6/x+(-3*x)/x+(-2*x)/x = 0
3*x-3*x*x-3*x-2*x-6-1 = 0
3*x-3*x^2-3*x-2*x-6-1 = 0
3*x-3*x^2-3*x-2*x-7 = 0
-3*x^2-2*x-7 = 0
-3*x^2-2*x-7 = 0
-1*(3*x^2+2*x+7) = 0
3*x^2+2*x+7 = 0
DELTA = 2^2-(3*4*7)
DELTA = -80
DELTA < 0
-1 = 0
-1/x = 0
-1/x = 0 // * x
-1 = 0
x belongs to the empty set
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