_________________ Решить неравенство _________________
3х²+9х-2х-6 ≥ 2х²+12 х²+7х-18 ≥ 0 D = 49+72 = 121 x₁ = -7-11 / 2 = -9 x₂ = -7+11 / 2 = 2 + - + ----------.----------.---------->x -9 2 x∈(-∞; -9]∪[2; +∞)