问题
填空题
若m、n满足|m-n|+（n+1）2=0，则m+n=______．
答案
根据题意，得：
，解得m-n=0 n+1=0
．故m+n=-1-1=-2．m=-1 n=-1
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若m、n满足|m-n|+（n+1）2=0，则m+n=______．
根据题意，得：
，解得m-n=0 n+1=0
．故m+n=-1-1=-2．m=-1 n=-1
| 完型填空。 | ||||
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