## anonymous one year ago Using the given zero, find all other zeros of f(x). -2i is a zero of f(x) = x4 - 32x2 - 144

1. anonymous

I give medals!

2. anonymous

hmm can you factor the quartic?

3. anonymous

notice $$\bf f(x) = x^4 - 32x^2 - 144\implies f(x)=({\color{brown}{ x^2}})^2-32({\color{brown}{ x^2}})-144$$ should be factorable for $$x^2$$

4. anonymous

2i,6,-6?