XYZ-XY-XZ+X-YZ+Y+Z-1我知道答案,一定要有点拔(文字),

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XYZ-XY-XZ+X-YZ+Y+Z-1我知道答案,一定要有点拔(文字),
XYZ-XY-XZ+X-YZ+Y+Z-1
我知道答案,一定要有点拔(文字),

XYZ-XY-XZ+X-YZ+Y+Z-1我知道答案,一定要有点拔(文字),
XYZ-XY-XZ+X-YZ+Y+Z-1 XYZ,XY提取公因式XY; XZ,X提取公因式X;YZ,Y提取公因式Y
=XY(Z-1)-X(Z-1)-Y(Z-1)+(Z-1) 提取公因式(Z-1);
=(Z-1)(XY-X-Y+1) XY,X 提取公因式X
=(Z-1)[X(Y-1)-(Y-1)] 提取公因式(Y-1)
=(Z-1)(Y-1)(X-1)

XYZ-XY-XZ+X-YZ+Y+Z-1
=XY(Z-1)-X(Z-1)-Y(Z-1)+(Z-1)
=(XY-X-Y+1)(Z-1)
=[X(Y-1)-(Y-1)](Z-1)
=(X-1)(Y-1)(Z-1)