B
下列不能用平方差
A．－（x-y-z)(x+y+z)=-[x-(y+z)][x+(y+z)]
B.(x-y-z)(-x+y+z)
C.(-x+y-z)(x+y+z)=[y-(x+z)][y+(x+z)]
D.(x+y+z)(x-y-z)=[x+(y+z)][x-(y+z)]
下列不能用平方差A．－（x-y-z)(x+y+z)B.(x-y-z)(-x+y+z)C.(-x+y-z)(x+y+z)D
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