The solution of the quadratic inequality (x3 + x - 12) ≥ 0 is

The solution of the quadratic inequality (x3 + x - 12) ≥ 0 is

Answer Details

(x3 + x - 12) ≥ 0
(x + 4)(x - 3) ≥ 0
Either x + 4 ≥ 0 implies x ≥ -4
Or x - 3 ≥ 0 implies x ≥ 3
∴ x ≥ 3 or x ≥ -4