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D( x )
(1-(2*x))^2 = 0
(1-(2*x))^2 = 0
(1-(2*x))^2 = 0
(1-2*x)^2 = 0
1-2*x = 0 // - 1
-2*x = -1 // : -2
x = -1/(-2)
x = 1/2
x in (-oo:1/2) U (1/2:+oo)
2.5 = ((2*x)^2)/((1-(2*x))^2) // - ((2*x)^2)/((1-(2*x))^2)
2.5-(((2*x)^2)/((1-(2*x))^2)) = 0
2.5-(((2*x)^2)/((1-2*x)^2)) = 0
(-1*4*x^2)/((1-2*x)^2)+2.5 = 0
(-1*4*x^2)/((1-2*x)^2)+(2.5*(1-2*x)^2)/((1-2*x)^2) = 0
2.5*(1-2*x)^2-1*4*x^2 = 0
6*x^2-10*x+2.5 = 0
6*x^2-10*x+2.5 = 0
6*x^2-10*x+2.5 = 0
DELTA = (-10)^2-(2.5*4*6)
DELTA = 40
DELTA > 0
x = (40^(1/2)+10)/(2*6) or x = (10-40^(1/2))/(2*6)
x = (2*10^(1/2)+10)/12 or x = (10-2*10^(1/2))/12
(x-((10-2*10^(1/2))/12))*(x-((2*10^(1/2)+10)/12)) = 0
((x-((10-2*10^(1/2))/12))*(x-((2*10^(1/2)+10)/12)))/((1-2*x)^2) = 0
((x-((10-2*10^(1/2))/12))*(x-((2*10^(1/2)+10)/12)))/((1-2*x)^2) = 0 // * (1-2*x)^2
(x-((10-2*10^(1/2))/12))*(x-((2*10^(1/2)+10)/12)) = 0
( x-((10-2*10^(1/2))/12) )
x-((10-2*10^(1/2))/12) = 0 // + (10-2*10^(1/2))/12
x = (10-2*10^(1/2))/12
( x-((2*10^(1/2)+10)/12) )
x-((2*10^(1/2)+10)/12) = 0 // + (2*10^(1/2)+10)/12
x = (2*10^(1/2)+10)/12
x in { (10-2*10^(1/2))/12, (2*10^(1/2)+10)/12 }
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