1)

I got:

$\displaystyle z=2+2i$ and I have to find the polar representation of z. Them find $\displaystyle z^4$ and $\displaystyle x+iy$ (when it's polar)...

My bid:

$\displaystyle w=rCos+i rSin$ to find the polar representation... right? So it would be something like: $\displaystyle w=r*cos(2)+r*sin(2i)$?

2a)

$\displaystyle w=x+iy$ find all values for w, when $\displaystyle w^2=-2i$

2b)

Find all z's when $\displaystyle z^2+(1+i)z+i=0$