Mathematics, 26.03.2020 16:52 cexe468

Three roots of the polynomial equation x ^ 4 - 4x ^ 3 - 2x ^ 2 + 12x + 9 = 0 are 3, - 1 and -1. Explain why the fourth root must be a real number. Find the fourth root.

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Three roots of the polynomial equation x ^ 4 - 4x ^ 3 - 2x ^ 2 + 12x + 9 = 0 are 3, - 1 and -1. Expl...

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