qr319988 qr319988 29-11-2022 Mathematics contestada Which quadratic inequality has a solution set where ∈ (− ∞, − 7] ∈ [5, ∞)? A x^2+ 2 − 21 ≥ 14 B ^2 − 5 − 35 ≤ 15 C ^2 − 5 + 3 < 9 D ^2+ 7 − 2 >− 12