因式分解:xx-2x-2yy+4y-xy
问题描述:
因式分解:xx-2x-2yy+4y-xy
答
xx-2x-2yy+4y-xy
=xx-2x-2yy+4y-2xy+xy=(xx-2x+xy)-(2yy-4y+2xy)
=x(x-2+y)-2y(y-2+x)
=(x+y-2)(x-2y)