去括号并化简
1.4xy²-3x²y-{3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)]}...
1. 4xy²-3x²y-{3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)]}
2. (3a³-2a²+5a+7)+(-2a²-½a+3)-(-4a³+½a²+6a-5) 展开
2. (3a³-2a²+5a+7)+(-2a²-½a+3)-(-4a³+½a²+6a-5) 展开
2个回答
展开全部
4xy²-3x²y-{3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)]}
解:原式= 4xy²-3x²y-{3x²y+xy²-2xy²+4x²y-x²y+2xy²}
=4xy²-3x²y-3x²y-xy²+2xy²-4x²y+x²y-2xy²
=3xy²-9x²y
解:原式= 4xy²-3x²y-{3x²y+xy²-2xy²+4x²y-x²y+2xy²}
=4xy²-3x²y-3x²y-xy²+2xy²-4x²y+x²y-2xy²
=3xy²-9x²y
本回答被提问者采纳
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
