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