Question

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

-2i is a zero of f(x) = x^4 - 5x^2 - 36

I think you factor right? I'm just not sure how to factor it..

Answer 1

treat it like the 2nd power

Answer 2

assuming you can factor it

Answer 3

if not since you were given -2i you can use synthetic division

Answer 4

finish doing synthetic division, your choice

Answer 5

oh great im good at synthetic, thats way better thank you! :)

Answer 6

also, don't forget that you can assume +2i and you can use that as well

Answer 7

Is -6i and 6i correct?