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D( b )
b = 0
b = 0
b = 0
b in (-oo:0) U (0:+oo)
(3/2)*b+5/b-1+3 = 0
3/2*b^1+5*b^-1+2*b^0 = 0
(3/2*b^2+2*b^1+5*b^0)/(b^1) = 0 // * b^2
b^1*(3/2*b^2+2*b^1+5*b^0) = 0
b^1
(3/2)*b^2+2*b+5 = 0
(3/2)*b^2+2*b+5 = 0
DELTA = 2^2-(4*5*(3/2))
DELTA = -26
DELTA < 0
b in { }
b belongs to the empty set
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