作业帮（x+y+z)(-x+y+z)(x-y+z)(x+y-z)怎么算
来源：学生作业帮助网 编辑：作业帮 时间：2024/10/04 01:49:03
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（x+y+z)(-x+y+z)(x-y+z)(x+y-z)怎么算
（x+y+z)(-x+y+z)(x-y+z)(x+y-z)怎么算
（x+y+z)(-x+y+z)(x-y+z)(x+y-z)怎么算
（x+y+z)(-x+y+z)(x-y+z)(x+y-z)
=-[(x+y+z)(x+y-z)] [(x-y+z)(x-y-z)]
=-[(x+y)²-z²]*[(x-y)²-z²]
=.
可以先提一个负号成为
-(x+y+z)(x+y-z)(x-y+z)(x-y-z)
然后乘开
后面自己做吧
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