在(x-y+z)(x+y-z)=[x+()][x-()]的括号内应填上的代数式是A.z-y,z-yB.z-y,z+yC.y+z,y+zD.

发布时间:2020-08-07 09:10:57

在(x-y+z)(x+y-z)=[x+(  )][x-(  )]的括号内应填上的代数式是A.z-y,z-yB.z-y,z+yC.y+z,y+zD.y+z,y-z

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A解析(x-y+z)(x+y-z)=(x+z-y)(x-z+y)=[x+(z-y)][x-(z-y)]∴正确
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