5m^3+9m^2+9m+7
问题描述:
5m^3+9m^2+9m+7
答
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