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