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algebra intermediate

Problem

Let , where , , and are complex numbers. Suppose that What is the number of nonreal zeros of ?
Solution
Note that From the three zeroes, we have . Then, we also have Let's do each factor case by case:

First, : Clearly, all the fourth roots are going to be nonreal.

Second, : The real roots are , and there are two nonreal roots.

Third, : The real roots are , and there are two nonreal roots.

Thus, the answer is .
Final answer
8