a^2+4a+1=0a²+1=4a两边同除以a得:a+1/a=4两边平方得:a²+1/a²=16-2=14(a^4+ma^2+1)/(2a^3+ma^2+2a)=5分子分母同除以x²得:(a²+1/a²+4m)/(2a+2/a+m)=5(14+4m)/(8+m)=514+4m=40+5mm=14-40m=-26