因式分解x²-y²-z²=2yz+2x+1
问题描述：
因式分解x²-y²-z²=2yz+2x+1
x²-y²-z²=2yz+2x+1因式分解
答
=其实是+
原式=(x²+2x+1)-(y²-2yz+z²)
=(x+1)²-(y-z)²
=(x+y-z+1)(x-y+z+1)