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D( x )
2*x-2 = 0
2*x-2 = 0
2*x-2 = 0
2*x-2 = 0 // + 2
2*x = 2 // : 2
x = 2/2
x = 1
x in (-oo:1) U (1:+oo)
(x^2-5)/(2*x-2)-((1/2)*x) = 0
(x^2-5)/(2*x-2)+(-1/2)*x = 0
(x^2-5)/(2*x-2)-x/2 = 0
(2*(x^2-5))/(2*(2*x-2))+(-x*(2*x-2))/(2*(2*x-2)) = 0
2*(x^2-5)-x*(2*x-2) = 0
2*x-10 = 0
(2*x-10)/(2*(2*x-2)) = 0
(2*x-10)/(2*(2*x-2)) = 0 // * 2*(2*x-2)
2*x-10 = 0
2*x-10 = 0 // + 10
2*x = 10 // : 2
x = 10/2
x = 5
x = 5
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