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D( b )
b = 0
b = 0
b = 0
b in (-oo:0) U (0:+oo)
b+12/b+29/24 = 0
1*b^1+12*b^-1+29/24*b^0 = 0
(1*b^2+29/24*b^1+12*b^0)/(b^1) = 0 // * b^2
b^1*(1*b^2+29/24*b^1+12*b^0) = 0
b^1
b^2+(29/24)*b+12 = 0
b^2+(29/24)*b+12 = 0
DELTA = (29/24)^2-(1*4*12)
DELTA = -26807/576
DELTA < 0
b in { }
b belongs to the empty set
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