Ответ Автор - BellwoodNor (x-11)^2-x*(x-11) = 0121 + x^2 - 22*x - x*(x - 11) = 0121 + x^2 - 22*x - x^2 + 11*x = 0121 - 11*x = 0-11*x = -121x = -121 / (-11)x = 11