因式分解:xx-2x-2yy+4y-xy

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因式分解:xx-2x-2yy+4y-xy
因式分解:xx-2x-2yy+4y-xy

因式分解:xx-2x-2yy+4y-xy
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)

题目错了吧?

xx-2x-2yy+4y-xy
=(xx-2yy-xy)-(2x-4y)
=(x+y)(x-2y)-2(x-2y)
=(x-2y)(x+y-2)
祝你好运

x^2-2x-2y^2+4y-xy
=(x^2-xy-2y^2)-(2x-4y)
=(x-2y)(x-y)-2(x-2y)
=(x-2y)(x- y-2)

是“x²-2x-2y²+4y-xy”吧
x²-2x-2y²+4y-xy
=x²-xy-2y²-2x+2y
=(x-2y)(x+y)-2(x-2y)
=(x-2y)(x+y-2)