How to I find all the factors in this question?

Here is a challenging problem. Consider the polynomial p[z] = 25 + 324 + 2523 + 3on 162 48. Give the set of complex linear factors of 3). To help you out, you are told that 2 + 21' is a root, and that three of the roots are integers. The set of factorsis: I | @. Note: Your set should he of a form like {21 , 2 (1+2 *I) }. Don't forget to use | {capital i) to represent the complex unit