3个回答
展开全部
4(x+y)²-(x-y)²
=[2(x+y)+(x-y)][2(x+y)-(x-y)]
=(2x+2y+x-y)(2x+2y-x+y)
=(3x+y)(x+3y);
=3x²+9xy+xy+3y²;
=3x²+10xy+3y².
=[2(x+y)+(x-y)][2(x+y)-(x-y)]
=(2x+2y+x-y)(2x+2y-x+y)
=(3x+y)(x+3y);
=3x²+9xy+xy+3y²;
=3x²+10xy+3y².
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