________________ / 2 \/ 2*x - 6*x - 8 >= x + 1
sqrt(2*x^2 - 6*x - 8) >= x + 1
Or(And(9 <= x, x < oo), And(x <= -1, -oo < x))
((9 <= x)∧(x < oo))∨((x <= -1)∧(-oo < x))
(-oo, -1] U [9, oo)
x in Union(Interval(-oo, -1), Interval(9, oo))