Решите неравенство:2x^2+5x-3>=0
Решение 2x² + 5x - 3 ≥ 0 D = 25 + 4*2*3 = 49 x₁ = (-5 - 7)/4 x₁ = -12/4 x₁ = - 3 x₂ = (-5 + 7)/4 x₂ = 2/4 x₂ = 1/2 + - + -----------------------------------------------------------------------> -3 1/2 x x∈(- ∞;- 3] [1/2; -∞)