下列变形是因式分解的是( )A.3x2y-xy+y=y(3x2-x)B.x2-2x+3=(x-1)2+2C.x2y2+2xy-1=(xy+1)(
下列变形是因式分解的是()A.3x2y-xy+y=y(3x2-x)B.x2-2x+3=(x-1)2+2C.x2y2+2xy-1=(xy+1)(xy-1)D.xn+2-xn...
下列变形是因式分解的是( )A.3x2y-xy+y=y(3x2-x)B.x2-2x+3=(x-1)2+2C.x2y2+2xy-1=(xy+1)(xy-1)D.xn+2-xn+1-xn=xn(x2-x+1)
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