Originally Posted by

**Kaln0s** Hi, I have two problems dealing with complex numbers, ill show you them and then what I try to do:

Given $\displaystyle z = x + iy, i = \sqrt-1$ So yeah y = the imaginary and z = x(real)

1. $\displaystyle z + 1 - i = (1+6) / (3 - i) $ Answer given: x = -4/5, y =7/5

^ This one I multiplied by the conjugate 3 + i on the right side. I got:

$\displaystyle z + 1 - i = (21 + 7i)/ 10$ and now do I'm unsure what to do.

2. $\displaystyle (2 + \sqrt-2)(1 - \sqrt-8)$

I'm not sure if I know how to multiply this out correctly...

$\displaystyle 2 - 2\sqrt-8 - \sqrt-2 + 2\sqrt4$?