若|m-3|+(n+2)²=0,则m+2n的值为多少
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![若|m-3|+(n+2)²=0,则m+2n的值为多少](/uploads/image/z/3695389-61-9.jpg?t=%E8%8B%A5%EF%BD%9Cm-3%EF%BD%9C%2B%28n%2B2%29%26%23178%3B%3D0%2C%E5%88%99m%2B2n%E7%9A%84%E5%80%BC%E4%B8%BA%E5%A4%9A%E5%B0%91)
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若|m-3|+(n+2)²=0,则m+2n的值为多少
若|m-3|+(n+2)²=0,则m+2n的值为多少
若|m-3|+(n+2)²=0,则m+2n的值为多少
|m-3|+(n+2)²=0,
所以m-3=n+2=0
m=3,n=-2
所以m+2n
=3-4
=-1
负一