I just need help with these questions, thanks.

Question

i^5
3(-2i)^2
-i(isqrt5)^2

Answer 1

Remember that i represents the square root of (-1). So, i^2 = -1

i^5 = (i^2)(i^2)(i)
=(-1)(-1)(i)
=?

Answer 2

Remember that i^2 = -1

3(-2i)^2
=3(-2)^2(i^2)
=?

-i(isqrt(5))^2
=-i(i^2)(sqrt(5))^2
=?