The polynomial equation x^3+x^2=-9x-9 has complex roots + / - 3i What is the other root? Use a graphing calculator and a system of equations.

Question

Mathematics

Figgy

21 August, 04:27

The polynomial equation x^3+x^2=-9x-9 has complex roots + / - 3i What is the other root? Use a graphing calculator and a system of equations.

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Answers (1)

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Morrow · Answer 1

For this case what you can do is factorize the polynomial equation, which would be left like follows

x ^ 3 + x ^ 2 + 9x + 9 = 0

(x + 1) (x ^ 2 + 9) = 0

Resolving, we have that the missing root is

x = - 1

Answer

x=-1