2 2*x - 6*x ---------- <= x x - 4
(2*x^2 - 6*x)/(x - 4) <= x
Or(And(2 <= x, x < 4), And(x <= 0, -oo < x))
((2 <= x)∧(x < 4))∨((x <= 0)∧(-oo < x))
(-oo, 0] U [2, 4)
x in Union(Interval(-oo, 0), Interval.Ropen(2, 4))