Question

若|m+n-5|+(2m+3n-5)的平方=0,则m= n=

Answer 1

若|m+n-5|+(2m+3n-5)的平方=0,则有：

{ m+n-5=0 (1)

{ 2m+3n-5=0 (2)

(1)×2得：2m+2n-10=0 (3)

(2)-(3)得：n+5=0

解得：n=-5,m=10