计算题:a^2+n/m*a+____=(_____+_____)^2

问题描述:

计算题:a^2+n/m*a+____=(_____+_____)^2
a^2+(n/m)*a+____=(_____+_____)^2

a^2+n/m*a+n^2/4m^2=(a+n/2m)^2