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D( x )
x-2 = 0
x-2 = 0
x-2 = 0
x-2 = 0 // + 2
x = 2
x in (-oo:2) U (2:+oo)
x-((4/(x-2))*(x-3)) = 0
x-4*(x-2)^-1*(x-3) = 0
(-4*(x-3))/(x-2)+x = 0
(-4*(x-3))/(x-2)+(x*(x-2))/(x-2) = 0
x*(x-2)-4*(x-3) = 0
x^2-6*x+12 = 0
x^2-6*x+12 = 0
x^2-6*x+12 = 0
DELTA = (-6)^2-(1*4*12)
DELTA = -12
DELTA < 0
1 = 0
1/(x-2) = 0
1/(x-2) = 0 // * x-2
1 = 0
x belongs to the empty set
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