因式分解 xy(x-y)- x(x-y)² ,
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因式分解xy(x-y)-x(x-y)²,因式分解xy(x-y)-x(x-y)²,因式分解xy(x-y)-x(x-y)²,xy(x-y)-x(x-y)²=x(x-
因式分解 xy(x-y)- x(x-y)² ,
因式分解 xy(x-y)- x(x-y)² ,
因式分解 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]
=-x²(x-y)
=x(x-y)[y-(x-y)]
=x(x-y)(2y-x)
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