根号下(m²+n²)²-(m²-n²)² (m>0,n<0)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/26 04:29:04
![根号下(m²+n²)²-(m²-n²)² (m>0,n<0)](/uploads/image/z/1964927-47-7.jpg?t=%E6%A0%B9%E5%8F%B7%E4%B8%8B%28m%26%23178%3B%2Bn%26%23178%3B%29%26%23178%3B-%28m%26%23178%3B-n%26%23178%3B%29%26%23178%3B+%EF%BC%88m%EF%BC%9E0%2Cn%EF%BC%9C0%EF%BC%89)
根号下(m²+n²)²-(m²-n²)² (m>0,n<0)
根号下(m²+n²)²-(m²-n²)² (m>0,n<0)
根号下(m²+n²)²-(m²-n²)² (m>0,n<0)
=√[(m²+n²+m²-n²)(m²+n²-m²+n²)
=√4m²n²
=|2mn|
=-2mn
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来源:学生作业帮助网 编辑:作业帮 时间:2024/06/26 04:29:04
根号下(m²+n²)²-(m²-n²)² (m>0,n<0)
根号下(m²+n²)²-(m²-n²)² (m>0,n<0)
根号下(m²+n²)²-(m²-n²)² (m>0,n<0)
=√[(m²+n²+m²-n²)(m²+n²-m²+n²)
=√4m²n²
=|2mn|
=-2mn