计算：(x-y-z)^2-(x-y+z)^2

(x-y-z)^2-(x-y+z)^2=[(x-y-z)+(x-y+z)][(x-y-z)-(x-y+z)]=(x-y-z+x-y+z)(x-y-z-x+y-z)=(2x-2y)(-2z)=-4z(x-y);很高兴为您解答,skyhunter002为您答疑解惑如果本题有什么不明白可以追问,