I'll do the first, I leave figuring out the second to youWe will solve equation in polar form, and then we can convert to the more familiar form using Euler's equation,

Let , then we have

But by Euler's equation, , hence

, and

for (after that, the solutions repeat)

Hence,

Which, by Euler's equation, gives:

those are the three roots in the complex numbers.

Now, off you go. Try what you've learned.x ^ 4 = -4

equations on the set of complex numbers?

Thanks in advance!