∵2m�0�5-2mn+n�0�5+4m+4=(m+2)�0�5+(m-n)�0�5=0∴m+2=0 m-n=0 即m=n=﹣2 ∴m�0�5n+mn�0�5=﹣16
2m�0�5-2mn+n�0�5+4m+4=0,(m-n)�0�5+(m+2)�0�5=0m-n=0 m=nm+2=0 m=-2则m�0�5n+mn�0�5=-16
