-(x-y)^3*(y-x)^4-(x-y)^7

1个回答

-(x-y)^3*(y-x)^4-(x-y)^7
=-(x-y)^3*(X-y)^4-(x-y)^7
=-(x-y)^7-(x-y)^7
=-2(X-Y)^7
如果本题有什么不明白可以追问,如果满意请点击“选为满意答案”