f(x)=x^4-1+x(x^2+3x-4)=(x^2-1)(x^2+1)+x(x+4)(x-1)=(x-1)(x+1)(x^2+1)+x(x+4)(x-1)=(x-1)[(x+1)(x^2+1)+x(x+4)]g(x)=x^2(x+1)-(x+1)=(x^2-1)(x+1)=(x-1)(x+1)(x+1)故:x-1为最大公因数
G(X)=(x-1)*(x+1)^2 F(X)=(x+1)*(x^3-3*x-1) so the answer is:……