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y in (-oo:+oo)
12*y^4+((6*y)/3)*y^2-(3*y^2) = 0
12*y^4+((6*y)/3)*y^2-3*y^2 = 0
12*y^4+2*y^3-3*y^2 = 0
y^2*(12*y^2+2*y-3) = 0
12*y^2+2*y-3 = 0
DELTA = 2^2-(-3*4*12)
DELTA = 148
DELTA > 0
y = (148^(1/2)-2)/(2*12) or y = (-148^(1/2)-2)/(2*12)
y = (2*37^(1/2)-2)/24 or y = (-2*37^(1/2)-2)/24
y^2 = 0
1*y^2 = 0 // : 1
y^2 = 0
y = 0
y in { (-2*37^(1/2)-2)/24, (2*37^(1/2)-2)/24, 0 }
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