15问答网 > m的2次方加n的2次方-6n+4m+13=0,则m的2次方-n的2次方=

m的2次方加n的2次方-6n+4m+13=0,则m的2次方-n的2次方=

2024-12-07 22:07:44
推荐回答（1个）
回答1：

m的2次方加n的2次方-6n+4m+13=0,则m的2次方-n的2次方=
m²+n²-6n+4m+13=0
m²+4m+4+n²-6n+9=0
(m+2)²+(n-3)²=0
m+2=0 n-3=0
∴m=-2 n=3
∴m²-n²=2²-3²=4-9=-5

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