为什么分式通分后有的分母是乘法有的却是加法?比如说4m²-9分之2mn 与 2m+3分之2m-3 通分后 分母是(2m+3)(2m-3) 而不是4m²-9 ;而x-5分之2x与x+5分之3x通分后分母却是x²-25而不是(x+5)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 10:16:27
![为什么分式通分后有的分母是乘法有的却是加法?比如说4m²-9分之2mn 与 2m+3分之2m-3 通分后 分母是(2m+3)(2m-3) 而不是4m²-9 ;而x-5分之2x与x+5分之3x通分后分母却是x²-25而不是(x+5)](/uploads/image/z/11342828-20-8.jpg?t=%E4%B8%BA%E4%BB%80%E4%B9%88%E5%88%86%E5%BC%8F%E9%80%9A%E5%88%86%E5%90%8E%E6%9C%89%E7%9A%84%E5%88%86%E6%AF%8D%E6%98%AF%E4%B9%98%E6%B3%95%E6%9C%89%E7%9A%84%E5%8D%B4%E6%98%AF%E5%8A%A0%E6%B3%95%3F%E6%AF%94%E5%A6%82%E8%AF%B44m%26%23178%3B-9%E5%88%86%E4%B9%8B2mn+%E4%B8%8E+2m%2B3%E5%88%86%E4%B9%8B2m-3+%E9%80%9A%E5%88%86%E5%90%8E+%E5%88%86%E6%AF%8D%E6%98%AF%EF%BC%882m%2B3%EF%BC%89%282m-3%29+%E8%80%8C%E4%B8%8D%E6%98%AF4m%26%23178%3B-9+%EF%BC%9B%E8%80%8Cx-5%E5%88%86%E4%B9%8B2x%E4%B8%8Ex%2B5%E5%88%86%E4%B9%8B3x%E9%80%9A%E5%88%86%E5%90%8E%E5%88%86%E6%AF%8D%E5%8D%B4%E6%98%AFx%26%23178%3B-25%E8%80%8C%E4%B8%8D%E6%98%AF%EF%BC%88x%2B5%EF%BC%89)
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