xy(x-y)-x(x-y)²

来源：学生作业帮助网编辑：作业帮时间：2024/04/20 19:45:12

xy(x-y)-x(x-y)²
xy(x-y)-x(x-y)²

xy(x-y)-x(x-y)²
xy(x-y)-x(x-y)²
=x(x-y)[y-(x-y)]
=x(x-y)(y-x+y)
=x(x-y)(2y-x)

xy(x-y)-x(x-y)²
=x(x-y)[y-(x-y)]
=x(x-y)(2y-x)

[xy-x(x-y)](x-y)
=(xy-x² xy)(x-y)
=x(2y-x)(x-y)