2013 Zhejiang Question 2 Single-choice Differentiating 2013_浙江 Paper 2.(5分)(2013•浙江)已知i是虚数单位,则(2+i)(3+i)=( ) A. 5﹣5iB. 7﹣5iC. 5+5iD. 7+5i Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →