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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1/2-((3/2)*x) = 4/x-(5/12) // - 4/x-(5/12)
1/2-((3/2)*x)-(4/x)+5/12 = 0
(-3/2)*x-4*x^-1+1/2+5/12 = 0
11/12*x^0-3/2*x^1-4*x^-1 = 0
(11/12*x^1-3/2*x^2-4*x^0)/(x^1) = 0 // * x^2
x^1*(11/12*x^1-3/2*x^2-4*x^0) = 0
x^1
(-3/2)*x^2+(11/12)*x-4 = 0
(-3/2)*x^2+(11/12)*x-4 = 0
DELTA = (11/12)^2-(-4*4*(-3/2))
DELTA = -3335/144
DELTA < 0
x in { }
x belongs to the empty set
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