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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)
4/x-2 = (6/(x-2))*(x+2)-6/x+2 // - (6/(x-2))*(x+2)-6/x+2
4/x-((6/(x-2))*(x+2))-(-6/x)-2-2 = 0
4/x-6*(x+2)*(x-2)^-1+6*x^-1-2-2 = 0
(-6*(x+2))/(x-2)+4/x+6/x-2-2 = 0
(-6*x*(x+2))/(x*(x-2))+(4*(x-2))/(x*(x-2))+(6*(x-2))/(x*(x-2))+(-2*x*(x-2))/(x*(x-2))+(-2*x*(x-2))/(x*(x-2)) = 0
4*(x-2)-6*x*(x+2)+6*(x-2)-2*x*(x-2)-2*x*(x-2) = 0
6*x-6*x^2-2*x^2-2*x^2-8*x+4*x+4*x-12-8 = 0
4*x-6*x^2-2*x^2-2*x^2-2*x+4*x-20 = 0
2*x-8*x^2-2*x^2+4*x-20 = 0
6*x-10*x^2-20 = 0
6*x-10*x^2-20 = 0
2*(3*x-5*x^2-10) = 0
3*x-5*x^2-10 = 0
DELTA = 3^2-(-10*(-5)*4)
DELTA = -191
DELTA < 0
2 = 0
2/(x*(x-2)) = 0
2/(x*(x-2)) = 0 // * x*(x-2)
2 = 0
x belongs to the empty set
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