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D( X )
X = 0
X = 0
X = 0
X in (-oo:0) U (0:+oo)
4-(5/X) = (11/3)*X // - (11/3)*X
4-((11/3)*X)-(5/X) = 0
(-11/3)*X-5*X^-1+4 = 0
4*X^0-11/3*X^1-5*X^-1 = 0
(4*X^1-11/3*X^2-5*X^0)/(X^1) = 0 // * X^2
X^1*(4*X^1-11/3*X^2-5*X^0) = 0
X^1
(-11/3)*X^2+4*X-5 = 0
(-11/3)*X^2+4*X-5 = 0
DELTA = 4^2-(-5*4*(-11/3))
DELTA = -172/3
DELTA < 0
X in { }
X belongs to the empty set
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