Multiplying Complex Numbers
To multiply two complex numbers, use the FOIL method for multiplying binomials, and remember that i2 = −1.
Example:
Multiply the two complex numbers 
and 
.
The product is 
.
To multiply two complex numbers, use the FOIL method for multiplying binomials, and remember that i2 = −1.
Example:
Multiply the two complex numbers and .
The product is .