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D( w )
w-2 = 0
w = 0
w-2 = 0
w-2 = 0
w-2 = 0 // + 2
w = 2
w = 0
w = 0
w in (-oo:0) U (0:2) U (2:+oo)
3/(w-2)+8/w = 5/w // - 5/w
3/(w-2)+8/w-(5/w) = 0
3/(w-2)+8/w-5*w^-1 = 0
3/(w-2)+8/w-5/w = 0
(3*w)/(w*(w-2))+(8*(w-2))/(w*(w-2))+(-5*(w-2))/(w*(w-2)) = 0
8*(w-2)-5*(w-2)+3*w = 0
11*w-5*w-16+10 = 0
6*w-6 = 0
(6*w-6)/(w*(w-2)) = 0
(6*w-6)/(w*(w-2)) = 0 // * w*(w-2)
6*w-6 = 0
6*w-6 = 0 // + 6
6*w = 6 // : 6
w = 6/6
w = 1
w = 1
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