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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3/x-(1/3) = (1/2)*x // - (1/2)*x
3/x-((1/2)*x)-(1/3) = 0
(-1/2)*x+3/x-1/3 = 0
3*x^-1-1/2*x^1-1/3*x^0 = 0
(3*x^0-1/2*x^2-1/3*x^1)/(x^1) = 0 // * x^2
x^1*(3*x^0-1/2*x^2-1/3*x^1) = 0
x^1
(-1/2)*x^2+(-1/3)*x+3 = 0
(-1/2)*x^2+(-1/3)*x+3 = 0
DELTA = (-1/3)^2-(3*4*(-1/2))
DELTA = 55/9
DELTA > 0
x = ((55/9)^(1/2)-(-1/3))/(2*(-1/2)) or x = (-(-1/3)-(55/9)^(1/2))/(2*(-1/2))
x = -((55/9)^(1/2)+1/3) or x = (55/9)^(1/2)-1/3
x in { -((55/9)^(1/2)+1/3), (55/9)^(1/2)-1/3}
x in { -((55/9)^(1/2)+1/3), (55/9)^(1/2)-1/3 }
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