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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(5/3)*x+2/x = 1/3 // - 1/3
(5/3)*x+2/x-(1/3) = 0
(5/3)*x+2/x-1/3 = 0
5/3*x^1+2*x^-1-1/3*x^0 = 0
(5/3*x^2-1/3*x^1+2*x^0)/(x^1) = 0 // * x^2
x^1*(5/3*x^2-1/3*x^1+2*x^0) = 0
x^1
(5/3)*x^2+(-1/3)*x+2 = 0
(5/3)*x^2+(-1/3)*x+2 = 0
DELTA = (-1/3)^2-(2*4*(5/3))
DELTA = -119/9
DELTA < 0
x in { }
x belongs to the empty set
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