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D( x )
4*x^2-(8*x)+4 = 0
4*x^2-(8*x)+4 = 0
4*x^2-(8*x)+4 = 0
4*x^2-8*x+4 = 0
4*x^2-8*x+4 = 0
DELTA = (-8)^2-(4*4*4)
DELTA = 0
x = 8/(2*4)
x = 1 or x = 1
x in (-oo:1) U (1:+oo)
(2*x)/(4*x^2-(8*x)+4) = 0
(2*x)/(4*x^2-8*x+4) = 0
4*x^2-8*x+4 = 0
4*(x^2-2*x+1) = 0
x^2-2*x+1 = 0
DELTA = (-2)^2-(1*1*4)
DELTA = 0
x = 2/(1*2)
x = 1 or x = 1
4*(x-1)^2 = 0
(2*x)/(4*(x-1)^2) = 0
2*x = 0 // : 2
x = 0
x = 0
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