Multiplying Complex Numbers

To find the product of A and B means to ____________ A and B.

• add

• subtract

• multiply

• divide

 $i\times5i=?$  

•  $5i$  

•  $5i^2$  

•  $25i^2$  

•  $4i$  

 $3i\times4=?$  

•  $12$  

•  $12i$  

•  $12i^2$  

•  $7i$  

 $-3i\times6$  

•  $-18$  

•  $18i$  

•  $-18i^2$  

•  $-18i$  

You should always substitute  $i^2$  with what number?

•  $i$  

•  $1$  

•  $-1$  

• You don't have to substitute  $i^2$  with anything. 

 $6i\times-7i$  

•  $-42i^2$  

•  $42i^2$  

•  $42i$  

•  $-42i$