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4) (12 pts) The polynomial p(x) = x4 + 4x3 + 6x2 + 64x - 160 has four complex zeros; two of them are real

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4) (12 pts) The polynomial p(x) = x4 + 4x3 + 6x2 + 64x - 160 has four complex zeros; two of them are real (and irrational), and the other two are non-real. Find all four zeros, given that one of them is 4i. Show all supporting work. No work = no credit. zeros x= uj, - yi

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