Using the given zero, find all other zeros of f(x). -2i is a zero of f(x) = x4 - 5x2 - 36

Question

amilapsn · Answer

one of the other zeros should be 2i...

anonymous · Answer

2i, 6i, -6i 

 2i, 3i, -3i 

 2i, 6, -6 

 2i, 3, -3 
These are my options

amilapsn · Answer

hey if this is a mcq then it's easier!!

amilapsn · Answer

guess what is the method you should use!!!

anonymous · Answer

Idk

amilapsn · Answer

What do you mean?

anonymous · Answer

I don't know how to solve this

amilapsn · Answer

if; $$ f(x)=x^4-5x^2-36$$ and one of the zeros of f(x) is -2i, then you can definitely say one of the ether zeros is 2i, okay??

amilapsn · Answer

@angelina1234  Hey are you there?

anonymous · Answer

Im here. I know 2i is but I need the other ones @amilapsn

amilapsn · Answer

so can you now say the two of the factors of f(x)?

anonymous · Answer

2i, 6i, -6i 

 2i, 3i, -3i 

 2i, 6, -6 

 2i, 3, -3 
 I need others. these are my options.

amilapsn · Answer

I know.. I'll help you.. For an example, if zeros of f(x) are 1 and two, can you say its factors?

anonymous · Answer

so 6 and -6? @amilapsn