X的四次方-4x²+4X-1=
问题描述:
X的四次方-4x²+4X-1=
答
X的四次方-4x²+4X-1
=x^4-(2x-1)²
=(x²+2x-1)(x²-2x+1)
=(x²+2x-1)(x-1)²