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y in (-oo:+oo)
y^2-(4*y^2)-y-(6/36) = 0
y^2-4*y^2-y-1/6 = 0
-3*y^2-y-1/6 = 0
DELTA = (-1)^2-(-3*(-1/6)*4)
DELTA = -1
DELTA < 0
y belongs to the empty set
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