因式分解X^4-X^2-4X^2+4
问题描述:
因式分解X^4-X^2-4X^2+4
答
(X-1)*(X-2)*(X+2)*(X+1)
我去!,有比我快的..
答
X^4-X^2-4X^2+4
=x²(x²-1)-4(x²-1)
=(x²-4)(x²-1)
=(x+2)(x-2)(x+1)(x-1)