x的平方-xy-2x+2y,分解公因式 急
人气：185 ℃ 时间：2020-04-23 06:01:26
解答
x^2-xy-2x+2y
=x^2-2x-xy+2y
=x(x-2)-y(x-2)
=(x-2)(x-y)
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