Find all solutions for $\displaystyle x^2-3x+5$ and express them in the form a+bi.

I dont really have a clue, I used the quadratic formula and got $\displaystyle (3+(-11)^(1/2))/2$ and $\displaystyle 3-(-11)^(1/2)/2$. From there I am totally clueless as to how to get to a+bi form.

Can anyone help?