fx=(x^2-1)(x+k)=x^3+kX^2-x-k=x^3+mx^2+nx+2 ,.m=k= -2,n= -1, 所以 fx=(x^2-1)(x-2) 除不尽,除非 fx=x3＋mx2＋nx-2,你确定没写错?
