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D( x )
2*x^2-(2*x) = 0
2*x^2-(2*x) = 0
2*x^2-(2*x) = 0
2*x^2-2*x = 0
2*x^2-2*x = 0
DELTA = (-2)^2-(0*2*4)
DELTA = 4
DELTA > 0
x = (4^(1/2)+2)/(2*2) or x = (2-4^(1/2))/(2*2)
x = 1 or x = 0
x in (-oo:0) U (0:1) U (1:+oo)
(2*x-1)/(2*x^2-(2*x)) = 0
(2*x-1)/(2*x^2-2*x) = 0
2*x^2-2*x = 0
2*x*(x-1) = 0
x-1 = 0 // + 1
x = 1
2*x*(x-1) = 0
(2*x-1)/(2*x*(x-1)) = 0
2*x-1 = 0 // + 1
2*x = 1 // : 2
x = 1/2
x = 1/2
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