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D( x )
x < 0
x < 0
x in <0:+oo)
x-12 = 16*x^(1/2) // - 16*x^(1/2)
x-(16*x^(1/2))-12 = 0
x-16*x^(1/2)-12 = 0
t_1 = x^(1/2)
1*t_1^2-16*t_1^1-12 = 0
t_1^2-16*t_1-12 = 0
DELTA = (-16)^2-(-12*1*4)
DELTA = 304
DELTA > 0
t_1 = (304^(1/2)+16)/(1*2) or t_1 = (16-304^(1/2))/(1*2)
t_1 = (4*19^(1/2)+16)/2 or t_1 = (16-4*19^(1/2))/2
t_1 = (16-4*19^(1/2))/2
x^(1/2)-((16-4*19^(1/2))/2) = 0
1*x^(1/2) = (16-4*19^(1/2))/2 // : 1
x^(1/2) = (16-4*19^(1/2))/2
( (16-4*19^(1/2))/2 < 0 i 1/2 in (0:1) ) => x należy do O
t_1 = (4*19^(1/2)+16)/2
x^(1/2)-((4*19^(1/2)+16)/2) = 0
1*x^(1/2) = (4*19^(1/2)+16)/2 // : 1
x^(1/2) = (4*19^(1/2)+16)/2
x^(1/2) = (4*19^(1/2)+16)/2 // ^ 2
x = ((4*19^(1/2)+16)^2)/4
x = ((4*19^(1/2)+16)^2)/4
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