Помогите пожалуйста
х^3 - 19х - 30 = 0

x^3 - 5x^2 + 5x^2 - 25x + 6x - 30 = 0(x - 5)(x^2 + 5x + 6) = 0(x - 5)(x + 2)(x + 3) = 0x1 = 5, x2 = -2, x3 = -3