(a-b-c)的3次方*(b+c-a)的2次方

2025-03-03 21:59:22
推荐回答(1个)
回答1:

原式=[-(a-b-c)]^2*[-(a-b-c)]^3
=(a-b-c)^2*[-(a-b-c)^3]
=-(a-b-c)^5