因式分解:x(x-y)(a-b)-y(y-x)(b-a)不明白为什么
1个回答
x(x-y)(a-b)-y(y-x)(b-a)
=x(x-y)(a-b)-y(x-y)(a-b)
=(x-y)(x-y)(a-b)
=(x-y)²(a-b)
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