:(a-b)²(x-y)-(b-a)(y-x)²
=（a-b）(x-y)(a-b+x-y);
分解因式:(a-b)的平方(x-y)-(b-a)(y-x)的平方
分解因式:(a-b)的平方(x-y)-(b-a)(y-x)的平方
数学人气：324 ℃时间：2020-05-31 07:20:54
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