Question

下列分解因式正确的是( )A.2x2-xy-x=2x(x-y-1)B.x2+x=...

下列分解因式正确的是( )A.2x2-xy-x=2x(x-y-1)B.x2+x=x2(1+1x)C.x(x-y)-y(x-y)=(x-y)2D.x2-x-6=x(x-1)-6

Answer 1

解答:解:A、2x2-xy-x=x(2x-y-1)，故本选项错误;
B、x2+x=x(x+1)，故本选项错误;
C、x(x-y)-y(x-y)=(x-y)2，故本选项正确;
D、x2-x-6=(x+2)(x-3)，故本选项错误.
故选C.