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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(4/3)*x = 5-(8/x) // - 5-(8/x)
(4/3)*x+8/x-5 = 0
4/3*x^1+8*x^-1-5*x^0 = 0
(4/3*x^2-5*x^1+8*x^0)/(x^1) = 0 // * x^2
x^1*(4/3*x^2-5*x^1+8*x^0) = 0
x^1
(4/3)*x^2-5*x+8 = 0
(4/3)*x^2-5*x+8 = 0
DELTA = (-5)^2-(4*8*(4/3))
DELTA = -53/3
DELTA < 0
x in { }
x belongs to the empty set
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