因式分解平方差公式 已知x+y+z=0,化简x^2-y^2+xz-yz
问题描述:
因式分解平方差公式 已知x+y+z=0,化简x^2-y^2+xz-yz
答
已知x+y+z=0
化简x^2-y^2+xz-yz
x^2-y^2+xz-yz
= (x+y)(x-y)+z(x-y)
=(x-y)(x+y+z)
=0
答
x^2-y^2+xz-yz=(x+y)(x-y)+z(x-y)=(x-y)(x+y+z)=0
答
原式=(x+y)(x-y)+z(x-y)
=(x-y)(x+y+z)
=0