a^2b(x-y)-ab(y-x)
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a^2b(x-y)-ab(y-x)a^2b(x-y)-ab(y-x)a^2b(x-y)-ab(y-x)=a²b(x-y)+ab(x-y)=ab(x-y)(a+1)a^2b(x-y)-ab(y
a^2b(x-y)-ab(y-x)
a^2b(x-y)-ab(y-x)
a^2b(x-y)-ab(y-x)
=a²b(x-y)+ab(x-y)
=ab(x-y)(a+1)
a^2b(x-y)-ab(y-x)
=a^2b(x-y)+ab(x-y)
=ab(x-y)(a+1)
a^2b(x-y)-ab(y-x)
因式分解a^2b(x-y)-ab(y-x)+b(x-y)
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