Here are some easy practice problems that you can try out to make sure you remember how to multiply complex numbers.
Problems
1. $ (1+j)*(2-3j) $
2. $ (1+j)*(2+3j) $
3. $ (1-j)*(2-3j) $
3. $ (1-j)*(2+3j) $
Solutions
1. $ 5-j $
2. $ -1+5j $
3. $ -1-5j $
3. $ 5+j $
