х^3-x^2-9x+9 = 0;
x^2(x - 1) - 9(x - 1) = 0
(x^2 - 9)(x-1) = 0
x^2 - 9 = 0 или x -1 =0
x^2 = 9 x = 1
x = +3; -3
ответ: +3, -3, 1
х^3-x^2-9x+9 = 0;
x^2(x - 1) - 9(x - 1) = 0
(x^2 - 9)(x-1) = 0
x^2 - 9 = 0 или x -1 =0
x^2 = 9 x = 1
x = +3; -3
ответ: +3, -3, 1