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y in (-oo:+oo)
(1/3)*y^2+y+1/12 = 0
1/3*y^2+y+1/12 = 0
DELTA = 1^2-(1/12*1/3*4)
DELTA = 8/9
DELTA > 0
y = ((8/9)^(1/2)-1)/(1/3*2) or y = (-(8/9)^(1/2)-1)/(1/3*2)
y = 3/2*((8/9)^(1/2)-1) or y = -3/2*((8/9)^(1/2)+1)
y in { -3/2*((8/9)^(1/2)+1), 3/2*((8/9)^(1/2)-1) }
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