已知m,x,y满足:(1)(x-5)²+|m|=0,(2)﹣2ab的y+1次方与4ab³是同类项.求代数式:(2x²-3xy+6y²)-m(3x²-xy+9y²)的值.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 18:13:46
![已知m,x,y满足:(1)(x-5)²+|m|=0,(2)﹣2ab的y+1次方与4ab³是同类项.求代数式:(2x²-3xy+6y²)-m(3x²-xy+9y²)的值.](/uploads/image/z/1107054-54-4.jpg?t=%E5%B7%B2%E7%9F%A5m%2Cx%2Cy%E6%BB%A1%E8%B6%B3%3A%EF%BC%881%EF%BC%89%EF%BC%88x%EF%BC%8D5%EF%BC%89%26%23178%3B%2B%7Cm%7C%EF%BC%9D0%2C%EF%BC%882%EF%BC%89%EF%B9%A32ab%E7%9A%84y%EF%BC%8B1%E6%AC%A1%E6%96%B9%E4%B8%8E4ab%26%23179%3B%E6%98%AF%E5%90%8C%E7%B1%BB%E9%A1%B9.%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F%EF%BC%9A%EF%BC%882x%26%23178%3B%EF%BC%8D3xy%2B6y%26%23178%3B%EF%BC%89%EF%BC%8Dm%EF%BC%883x%26%23178%3B%EF%BC%8Dxy%2B9y%26%23178%3B%EF%BC%89%E7%9A%84%E5%80%BC.)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 18:13:46