㎡+3m+1=0,两边同除以m,得m+3+1/m=0m+1/m=-3㎡+1/㎡=(m+1/m)²-2=(-3)²-2=7
㎡+3m+1=0m+3+1/m=0m+1/m=-3m²+1/m²=(m+1/m)²-2=9-2=7
