Question

complex zeros to give the fully factored form :
(-3) (x-2i)(x+2i) but this to be finished must have a x in it. Can anyone help me?

Answer 1

not sure what you mean, you can multiply this out if you like
you will get \(-3(x^2+4)\) as a start

Answer 2

otherwise what you have is fully factored as it is

Answer 3

You have x's in there. Your complex zeros are (x - 2i) = 0 and (x + 2i) = 0, giving x = 2i and x = -2i as the zeros.