计算(x-y)^5,
1个回答
展开全部
(x-y)(x-y)(x-y)(x-y)(x-y)
=(x²+2xy+y²)(x-y)(x-y)(x-y)
=(x³+3x²y+3xy²+y³)(x-y)(x-y)
=(x^4+4x³y+6x²y²+4xy³+y^4)(x-y)
=x^5+5x^4y+10x³y²+10x²y³+xy^4+y^5
=(x²+2xy+y²)(x-y)(x-y)(x-y)
=(x³+3x²y+3xy²+y³)(x-y)(x-y)
=(x^4+4x³y+6x²y²+4xy³+y^4)(x-y)
=x^5+5x^4y+10x³y²+10x²y³+xy^4+y^5
本回答由提问者推荐
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
