2 2 (5*x + 2) >= (4 - 2*x)
(5*x + 2)^2 >= (4 - 2*x)^2
(-oo, -2] U [2/7, oo)
x in Union(Interval(-oo, -2), Interval(2/7, oo))
Or(And(2/7 <= x, x < oo), And(x <= -2, -oo < x))
((2/7 <= x)∧(x < oo))∨((x <= -2)∧(-oo < x))