(A + iB)(C + iD)=

(AC + ADi) + (BC +BD)
125 votes

(AD + BCi) + (BD + ABi)
128 votes

(BC - DC)i + k(i + AC)
155 votes

(AC - BD) + (AD + BC)i
123 votes

Comments

giovyyygugui..have you got math text today???

guguiYes, i'll get a 9!

giovyyyyou are so amazing...1 week and then a baita!!!!

ClaudiaBoo