第四,五,六,题,求学霸,高速釆纳!万分感谢。数学
3个回答
2014-06-24 · 知道合伙人教育行家
关注
展开全部
4、81x^5y^5-xy
=xy(81x^4y^4-1)
=xy(9x^2y^2+1)(9x^2y^2-1)
=xy(9x^2y^2+1)(3xy+1)(3xy-1)
5、1/2m^3n-1/2m^2n^2+1/8mn^3
=1/2mn(m^2-mn+1/4n^2)
=1/2mn(m-1/2n)^2
6、(a+b)^2+2(a+b)(b-c)+(b-c)^2
=[(a+b)+(b-c)]^2
=(a+2b-c)^2
=xy(81x^4y^4-1)
=xy(9x^2y^2+1)(9x^2y^2-1)
=xy(9x^2y^2+1)(3xy+1)(3xy-1)
5、1/2m^3n-1/2m^2n^2+1/8mn^3
=1/2mn(m^2-mn+1/4n^2)
=1/2mn(m-1/2n)^2
6、(a+b)^2+2(a+b)(b-c)+(b-c)^2
=[(a+b)+(b-c)]^2
=(a+2b-c)^2
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