因为X^2+2mx+2m^2+2008=(x^2+2mx+m^2)+m^2+2008=(x+m)^2+m^2+2008;因为:(x+m)^2>=0,m^2>=0,2008>0;所以:(x+m)^2+m^2+2008>0;所以:X^2+2mx+2m^2+2008>0恒成立
X^2+2mx+2m^2+2008=(x+m)^2+m^2+2008恒大于零
原式=(x+m)*2+m*2+2008可以看出恒大于0
X^2+2mx+2m^2+2008=(x+m)^2+m^2+2008