题目内容
下列分解因式正确的是( )
A.2x2-xy-x=2x(x-y-1) | B.-x2+2xy-3y=-y(xy-2x-3) |
C.x(x-y)-y(x-y)=(x-y)2 | D.x2-x-3=x(x-1)-3 |
A、2x2-xy-x=x(2x-y-1),故此选项错误;
B、-x2+2xy-3y,无法因式分解,故此选项错误;
C、x(x-y)-y(x-y)=(x-y)2,故此选项正确;
D、x2-x-3无法因式分解,故此选项错误;
故选:C.
B、-x2+2xy-3y,无法因式分解,故此选项错误;
C、x(x-y)-y(x-y)=(x-y)2,故此选项正确;
D、x2-x-3无法因式分解,故此选项错误;
故选:C.
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