(a-b)2(x-y)-(b-a)(y-x)2=(a-b)(x-y)×_.
问题描述:
(a-b)2(x-y)-(b-a)(y-x)2=(a-b)(x-y)×______.
答
原式=(a-b)2(x-y)+(a-b)(x-y)2=(a-b)(x-y)(a-b+x-y),
故答案为:(a-b+x-y).