代数式去括号并合拼同类项“3x²y+xy²-【2xy²-4x²+(x²y-2xy²)】
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 16:32:39
![代数式去括号并合拼同类项“3x²y+xy²-【2xy²-4x²+(x²y-2xy²)】](/uploads/image/z/1163133-45-3.jpg?t=%E4%BB%A3%E6%95%B0%E5%BC%8F%E5%8E%BB%E6%8B%AC%E5%8F%B7%E5%B9%B6%E5%90%88%E6%8B%BC%E5%90%8C%E7%B1%BB%E9%A1%B9%E2%80%9C3x%26%23178%3By%2Bxy%26%23178%3B-%E3%80%902xy%26%23178%3B-4x%26%23178%3B%2B%28x%26%23178%3By-2xy%26%23178%3B%29%E3%80%91)
代数式去括号并合拼同类项“3x²y+xy²-【2xy²-4x²+(x²y-2xy²)】
代数式去括号并合拼同类项“3x²y+xy²-【2xy²-4x²+(x²y-2xy²)】
代数式去括号并合拼同类项“3x²y+xy²-【2xy²-4x²+(x²y-2xy²)】
3x²y+xy²-[2xy²-4x²+(x²y-2xy²)]
=3x²y+xy²-2xy²+4x²-x²y+2xy²
=2x²y+3xy²+4x²