2 x + 8*x 20 -------- <= ----- x + 6 x + 6
(x^2 + 8*x)/(x + 6) <= 20/(x + 6)
Or(And(x <= -10, -oo < x), And(x <= 2, -6 < x))
((x <= -10)∧(-oo < x))∨((x <= 2)∧(-6 < x))
(-oo, -10] U (-6, 2]
x in Union(Interval(-oo, -10), Interval.Lopen(-6, 2))