Question

Find the product of the complex numbers and enter it below. Remember that i = .

(4 - i )(1 + 4i )

Answer 1

Do you know how to multiply two polynomials together?

Answer 2

yes i do

Answer 3

ok, it's baiscally like that, except you need to understand imaginary numbers:
http://betterexplained.com/articles/a-visual-intuitive-guide-to-imaginary-numbers/
see the above page for a detailed explanation, read it and then get back to me if you still have questions.

Answer 4

You can treat i like a variable (eg. x) until it's time to evaluate it

Answer 5

So multiply the numbers together like polynomials and then evaluate i as described in the link