# Math Help - imaginary number multiplication

1. ## imaginary number multiplication

im try to post my eqaution but i want to no how to use the math tags

2. Go here for LaTeX help.

3. $
(\frac{1}{2} + \frac{\sqrt{2}}{2} i)^2
$

4. So the rules are the same as for regular multiplication. Foil it out. All you have to remember is that $i^{2}=-1$.