Question

Using the given zero, find all other zeros of f(x).

-2i is a zero of f(x) = x4 - 45x2 - 196

Answer 1

One more zero will be the conjugate of -2i

Answer 2

What will it be?

Answer 3

Any idea?

Answer 4

maybe

Answer 5

Could you be a little more clear about that? @tdubb

Answer 6

Instead of saying maybe can you actually tell what you think?

Answer 7

One root is -2i. Another is the "conjugate" of -2i. What is this conjugate? Look up that word if need be.

Answer 8

tdubb: Please participate in the discussion if you post a problem. Our purpose is to guide you towards finding the correct answer yourself, not to do the work for you.

Again, what is the conjugate of -2i? You need to understand this.