作业帮先去括号,再合并同类项：3x²y-[2xy²-2（xy-2/3x²y）+xy]+3xy²
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 14:01:45
![先去括号,再合并同类项：3x²y-[2xy²-2（xy-2/3x²y）+xy]+3xy²](/uploads/image/z/695960-8-0.jpg?t=%E5%85%88%E5%8E%BB%E6%8B%AC%E5%8F%B7%2C%E5%86%8D%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%EF%BC%9A3x%26%23178%3By-%5B2xy%26%23178%3B-2%EF%BC%88xy-2%2F3x%26%23178%3By%EF%BC%89%2Bxy%5D%2B3xy%26%23178%3B)
先去括号,再合并同类项：3x²y-[2xy²-2（xy-2/3x²y）+xy]+3xy²
先去括号,再合并同类项：3x²y-[2xy²-2（xy-2/3x²y）+xy]+3xy²
先去括号,再合并同类项：3x²y-[2xy²-2（xy-2/3x²y）+xy]+3xy²
原式=3x²y-[2xy²-2xy+4/3x²y+xy]+3xy²
=3x²y-2xy²+2xy-4/3x²y-xy+3xy²
=5／3x²y+xy²+xy
希望满意采纳.