Ответ Автор - kvadrantuk 2) -3x^2 + 2x +1/2 = 0 a = -3 b = 2 c = 1/23) -(x^2)/3 -2x - 0.5 = 0 a = -1/3, b = -2, c = -0.5 4) x^2 - x - 1 =0 a = 1, b = -1, c = -15) - x^2 + 3x = 0 a = -1, b = 3, c = 06) x^2 - 5 = 0 a = 1, b = 0, c = -5