作业帮求(m²+n²)²-[(-m)²-(-n)²]²的值,方法是平方差公逆用.急.
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/08 13:14:09
![求(m²+n²)²-[(-m)²-(-n)²]²的值,方法是平方差公逆用.急.](/uploads/image/z/7839164-20-4.jpg?t=%E6%B1%82%28m%26%23178%3B%2Bn%26%23178%3B%29%26%23178%3B-%5B%28-m%29%26%23178%3B-%28-n%29%26%23178%3B%5D%26%23178%3B%E7%9A%84%E5%80%BC%2C%E6%96%B9%E6%B3%95%E6%98%AF%E5%B9%B3%E6%96%B9%E5%B7%AE%E5%85%AC%E9%80%86%E7%94%A8.%E6%80%A5.)
求(m²+n²)²-[(-m)²-(-n)²]²的值,方法是平方差公逆用.急.
求(m²+n²)²-[(-m)²-(-n)²]²的值,方法是平方差公逆用.急.
求(m²+n²)²-[(-m)²-(-n)²]²的值,方法是平方差公逆用.急.
(m²+n²)²-[(-m)²-(-n)²]²=(m²+n²)²-(m²-n²)²
=(m²+n²+m²-n²)[m²+n²-(m²-n²)]
=2m²*2n²
=4m²n²
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