______________ ____________ / 2 / 2 \/ 2*x - x - 6 <= \/ 3*x - 8*x
sqrt(2*x^2 - x - 6) <= sqrt(3*x^2 - 8*x)
Or(And(6 <= x, x < oo), And(x <= -3/2, -oo < x))
((6 <= x)∧(x < oo))∨((x <= -3/2)∧(-oo < x))
(-oo, -3/2] U [6, oo)
x in Union(Interval(-oo, -3/2), Interval(6, oo))