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