x^3 - 3x^2 - 4x + 12 = 0 x^2(x-3) - 4(x-3) = 0 (x^2-4)(x-3) = 0 (x-2)(x+2)(x-3) = 0 x = 2 или x = -2 или x = 3 Ответ: -2; 2; 3 2) x^2 + 2x - 16x + 49 = 0 x^2 -14x + 49 = 0 (x-7)^2 = 0 x = 7