m^2-5m-1=0m^2=5m+1原式=10m+2-5m+1/(5m+1)=5m+2+1/(5m+1)=(25m^2+15m+3)/(5m+1)=(125m+25+15m+3)/(5m+1)=(140m+28)/(5m+1)=28(5m+1)/(5m+1)=28
