x^3-6x^2+11x-6 ＝x^3-x^2-5x^2+11x-6 =x^2*(x-1)-(5x^2-11x+6) =x^2*(x-1)-(x-1)(5x-6) =(x-1)(x^2-5x+6) 故：m=-5,n=6