m^2十n^2十4m一2n十5=o,求3m^2十5n^2一4

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m^2十n^2十4m一2n十5=o,求3m^2十5n^2一4m^2十n^2十4m一2n十5=o,求3m^2十5n^2一4m^2十n^2十4m一2n十5=o,求3m^2十5n^2一4m^2十n^2十4m

m^2十n^2十4m一2n十5=o,求3m^2十5n^2一4
m^2十n^2十4m一2n十5=o,求3m^2十5n^2一4

m^2十n^2十4m一2n十5=o,求3m^2十5n^2一4
m^2十n^2十4m一2n十5=o
(m^2+4m+4)+(n^2-2n+1)=0
(m+2)^2+(n-1)^2=0
m=-2 n=1
3m^2+5n^2-4
=3x(-2)^2+5x1^2-4
=12+5-4
=13
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