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D( x )
4*x-8 = 0
4*x-8 = 0
4*x-8 = 0
4*x-8 = 0 // + 8
4*x = 8 // : 4
x = 8/4
x = 2
x in (-oo:2) U (2:+oo)
0 = (x^2-(2*x))/(4*x-8) // - (x^2-(2*x))/(4*x-8)
0-((x^2-(2*x))/(4*x-8)) = 0
-((x^2-2*x)/(4*x-8)) = 0
(-1*(x^2-2*x))/(4*x-8) = 0
x^2-2*x = 0
x*(x-2) = 0
x-2 = 0 // + 2
x = 2
x*(x-2) = 0
(-1*x*(x-2))/(4*x-8) = 0
( -1 )
-1 = 0
x belongs to the empty set
( x-2 )
x-2 = 0 // + 2
x = 2
( x )
x = 0
x in { 2}
x = 0
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