x^4-x^2-2x-1因式分解
问题描述:
x^4-x^2-2x-1因式分解
答
x^4-x^2-2x-1
=x^4-(x^2+2x+1)
=x^4-(x+1)^2
=(x^2+x+1)(x^2-x-1)