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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x-(6/x) = x-2 // - x-2
3*x-x-(6/x)+2 = 0
3*x-x-6*x^-1+2 = 0
2*x^1-6*x^-1+2*x^0 = 0
(2*x^2+2*x^1-6*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^2+2*x^1-6*x^0) = 0
x^1
2*x^2+2*x-6 = 0
2*x^2+2*x-6 = 0
DELTA = 2^2-(-6*2*4)
DELTA = 52
DELTA > 0
x = (52^(1/2)-2)/(2*2) or x = (-52^(1/2)-2)/(2*2)
x = (2*13^(1/2)-2)/4 or x = (-2*13^(1/2)-2)/4
x in { (-2*13^(1/2)-2)/4, (2*13^(1/2)-2)/4}
x in { (-2*13^(1/2)-2)/4, (2*13^(1/2)-2)/4 }
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