like you would have multiplied any traditional binomial you just have to remember this isn't a variable this is the imaginary unit i, or it's just i but we can do that in two ways we can just do distributive properties twice which I like a little bit more just because it actually, you're doing it from a fundamental principle, it's nothing new or you could use FOlL, which you also used when you first multiplied binomials, and I'll do it both ways.