(x+y-z)(x-y+z)-(y+z-x)(z-x-y)公因式 过程(x+y-z)(x-y+z)-(y+z-x)(z-x-y)=(x+y-z)(x-y+z)+(y+z-x)为什么变成加号只有后面的变号
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![(x+y-z)(x-y+z)-(y+z-x)(z-x-y)公因式 过程(x+y-z)(x-y+z)-(y+z-x)(z-x-y)=(x+y-z)(x-y+z)+(y+z-x)为什么变成加号只有后面的变号](/uploads/image/z/7157436-60-6.jpg?t=%28x%2By-z%29%28x-y%2Bz%29-%28y%2Bz-x%29%28z-x-y%29%E5%85%AC%E5%9B%A0%E5%BC%8F+%E8%BF%87%E7%A8%8B%28x%2By-z%29%28x-y%2Bz%29-%28y%2Bz-x%29%28z-x-y%29%3D%28x%2By-z%29%28x-y%2Bz%29%2B%28y%2Bz-x%29%E4%B8%BA%E4%BB%80%E4%B9%88%E5%8F%98%E6%88%90%E5%8A%A0%E5%8F%B7%E5%8F%AA%E6%9C%89%E5%90%8E%E9%9D%A2%E7%9A%84%E5%8F%98%E5%8F%B7)
(x+y-z)(x-y+z)-(y+z-x)(z-x-y)公因式 过程(x+y-z)(x-y+z)-(y+z-x)(z-x-y)=(x+y-z)(x-y+z)+(y+z-x)为什么变成加号只有后面的变号
(x+y-z)(x-y+z)-(y+z-x)(z-x-y)公因式 过程(x+y-z)(x-y+z)-(y+z-x)(z-x-y)=(x+y-z)(x-y+z)+(y+z-x)
为什么变成加号只有后面的变号
(x+y-z)(x-y+z)-(y+z-x)(z-x-y)公因式 过程(x+y-z)(x-y+z)-(y+z-x)(z-x-y)=(x+y-z)(x-y+z)+(y+z-x)为什么变成加号只有后面的变号
(x+y-z)(x-y+z)-(y+z-x)(z-x-y)公因式
过程(x+y-z)(x-y+z)-(y+z-x)(z-x-y)=(x+y-z){(x-y+z)+(y+z-x)}
(x+y-z)(x-y+z)-(y+z-x)(z-x-y)=(x+y-z)(x-y+z)+(-1)(y+z-x)(z-x-y)
=(x+y-z)(x-y+z)+(y+z-x)(-1)(z-x-y)
=(x+y-z)(x-y+z)+(y+z-x)(x+y-z)
=(x+y-z){(x-y+z)+(y+z-x)}
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