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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)
2/x = 3/(x-2)-1 // - 3/(x-2)-1
2/x-(3/(x-2))+1 = 0
2/x-3*(x-2)^-1+1 = 0
2/x-3/(x-2)+1 = 0
(-3*x)/(x*(x-2))+(2*(x-2))/(x*(x-2))+(1*x*(x-2))/(x*(x-2)) = 0
2*(x-2)+1*x*(x-2)-3*x = 0
x^2-x-2*x-4 = 0
x^2-3*x-4 = 0
x^2-3*x-4 = 0
x^2-3*x-4 = 0
DELTA = (-3)^2-(-4*1*4)
DELTA = 25
DELTA > 0
x = (25^(1/2)+3)/(1*2) or x = (3-25^(1/2))/(1*2)
x = 4 or x = -1
(x+1)*(x-4) = 0
((x+1)*(x-4))/(x*(x-2)) = 0
((x+1)*(x-4))/(x*(x-2)) = 0 // * x*(x-2)
(x+1)*(x-4) = 0
( x+1 )
x+1 = 0 // - 1
x = -1
( x-4 )
x-4 = 0 // + 4
x = 4
x in { -1, 4 }
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