Would a negative imaginary number times an imaginary number be positive? I know that $\sqrt{-1} = i$
and that $ i^2 = -1$, and I'm sure $i^3 = -i$. So, would $i^4 = +1$?
I'm sort of confused about this. Can you smart guys explain?

Yes that's correct $$i^4 = i^2\cdot i^2=(-1)\cdot (-1) = 1$$
