m�0�5-5m-1=0m�0�5-1=5mm-1/m=5然后两边同时平方m�0�5+1/m�0�5+2=25m�0�5+1/m�0�5=23然后后面一个式子变成2m�0�5-5m+1/m�0�5= m�0�5+m�0�5-5m+1/m�0�5=23+m�0�5-5m又因为m�0�5-5m=1所以2m�0�5-5m+1/m�0�5=24
