x(a-x)(a-y)-y(x-a)(y-a)怎么因式分解
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x(a-x)(a-y)-y(x-a)(y-a)
=x(a-x)(a-y)-y(a-x)(a-y)
=(a-x)(a-y)(x-y)
=x(a-x)(a-y)-y(a-x)(a-y)
=(a-x)(a-y)(x-y)
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