5m^3+9m^2+9m+7

问题描述:

5m^3+9m^2+9m+7

5m^3+9m^2+9m+7=(m+1)(5m^2+4m+5)+2
因为5m^2+4m+5>=21/2,所以
(m+1)(5m^2+4m+5)+2