已知m^2+n^2-6m+10n+34=0求2m-3n的值

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已知m^2+n^2-6m+10n+34=0求2m-3n的值已知m^2+n^2-6m+10n+34=0求2m-3n的值已知m^2+n^2-6m+10n+34=0求2m-3n的值m^2+n^2-6m+10

已知m^2+n^2-6m+10n+34=0求2m-3n的值
已知m^2+n^2-6m+10n+34=0求2m-3n的值

已知m^2+n^2-6m+10n+34=0求2m-3n的值
m^2+n^2-6m+10n+34=0
(m-3)^2+(n+5)^2=0
m-3=0 m=3
n+5=0 n= -5
2m-3n=21

m^2+n^2-6m+10n+34=0
(m-3)²-9+(n+5)²-25+34=0
(m-3)²+(n+5)²=0
m=3 n=-5
2m-3n=2*3-3*(-5)=21