(X-Y)^3等于多少?
展开全部
(X-Y)^3
=(X-Y)(X-Y)(X-Y)
=(X^2-2XY+Y^2)(X-Y)
=X^3-2X^2Y+XY^2-X^2Y+2X^2Y-Y^3
=X^3-3X^2Y+3XY^2-Y^3
=(X-Y)(X-Y)(X-Y)
=(X^2-2XY+Y^2)(X-Y)
=X^3-2X^2Y+XY^2-X^2Y+2X^2Y-Y^3
=X^3-3X^2Y+3XY^2-Y^3
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