若实数m,n满足m²+n²+2m-4n+5=0,求m的n方

若实数m,n满足m²+n²+2m-4n+5=0,求m的n方
若实数m,n满足m²+n²+2m-4n+5=0,求m的n方

若实数m,n满足m²+n²+2m-4n+5=0,求m的n方
(m+1)^2+(n-2)^2=0
==>
m+1=0且n-2=0
==>
m=-1
n=2
(-1)^2=1