m2+5m+1=0m2+5m=-1m²+1=-5m2m²+5m+1/m²=m²+5m+m²+1/m²=-1+（m²+2+1/m²）-2=（m+1/m）²-3=[(m²+1）/m]²-3=（-5m/m）²-3=25-3=22