Quick math question, 10 points

[From: ] [author: ] [Date: 13-03-06] [Hit: ]

Pre-Calculus:
Find a polynomial with real coefficients that has zeros -10, 2i, and -2i.

(x + 10)(x^2 + 4) = x^3 + 4x + 10x^2 + 40

x^3 + 10 x^2 + 4x + 40

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