x²-y²-2x+1 因式分解
问题描述：
x²-y²-2x+1 因式分解
答
x²-y²-2x+1=x²-2x+1-y²
=(X-1)²-y²
=(X+Y-1)(X-Y-1)
答
x²-y²-2x+1
=x²-2x+1-y²
=(x-1)²-y²
=(x-1-y)(x-1+y)
答
x²-y²-2x+1
=(x²-2x+1)-y²
=(x-1)²-y²
=(x-1+y)(x-1-y)