hey I'm having trouble with a concept of these. I know know how to form a polynomial with real and complex zeros when I'm given them, but I dont know what to do unless it's a zero in the form of A+Bi.

Form a polynomial with real coefficients having the given degree and zeros. Degree: 4 Zeros:

So 4th degree (x-2)(x+2)(-9i)(9i)? I tried this and got:

...... wrong

Given the following complex zero of the polynomial find all remaining real zeros and express in factored form with real coefficients.

Complex zero =

I have no idea where to start on this.. normally we can just factor out the zero and go from there, but this is different...

Form a polynomial with real coefficients having the given degree and zeros.

Degree: 4

Zeros:

So... again (5i)^2 (2-3i)(2+3i) or would it be (5i)(-5i)?

Thanks