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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
4/x-((1/3)*x) = 2 // - 2
4/x-((1/3)*x)-2 = 0
(-1/3)*x+4/x-2 = 0
4*x^-1-1/3*x^1-2*x^0 = 0
(4*x^0-1/3*x^2-2*x^1)/(x^1) = 0 // * x^2
x^1*(4*x^0-1/3*x^2-2*x^1) = 0
x^1
(-1/3)*x^2-2*x+4 = 0
(-1/3)*x^2-2*x+4 = 0
DELTA = (-2)^2-(4*4*(-1/3))
DELTA = 28/3
DELTA > 0
x = ((28/3)^(1/2)+2)/(2*(-1/3)) or x = (2-(28/3)^(1/2))/(2*(-1/3))
x = -3/2*((28/3)^(1/2)+2) or x = -3/2*(2-(28/3)^(1/2))
x in { -3/2*((28/3)^(1/2)+2), -3/2*(2-(28/3)^(1/2))}
x in { -3/2*((28/3)^(1/2)+2), -3/2*(2-(28/3)^(1/2)) }
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