作业帮3x²y+xy²-[2xy²-4x²y+（x²y-2xy²）],计算步骤是什么急,
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 12:51:31
![3x²y+xy²-[2xy²-4x²y+（x²y-2xy²）],计算步骤是什么急,](/uploads/image/z/695959-7-9.jpg?t=3x%26%23178%3By%2Bxy%26%23178%3B-%5B2xy%26%23178%3B-4x%26%23178%3By%2B%EF%BC%88x%26%23178%3By-2xy%26%23178%3B%EF%BC%89%5D%2C%E8%AE%A1%E7%AE%97%E6%AD%A5%E9%AA%A4%E6%98%AF%E4%BB%80%E4%B9%88%E6%80%A5%2C)
3x²y+xy²-[2xy²-4x²y+（x²y-2xy²）],计算步骤是什么急,
3x²y+xy²-[2xy²-4x²y+（x²y-2xy²）],计算步骤是什么
急,
3x²y+xy²-[2xy²-4x²y+（x²y-2xy²）],计算步骤是什么急,
原式=3x²y+xy²-2xy²+4x²y-x²y+2xy²
=3x²y+4²y-x²y+xy²-2xy²+2xy²
=6x²y+xy²
=xy（6x+y）