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MathNet 2026 — Part 10 Question 81

Math Olympiad Vault · MathNet 2026 — Part 10

Question 81

Suppose $x$ satisfies $x^{3}+x^{2}+x+1=0$. What are all possible values of $x^{4}+2 x^{3}+2 x^{2}+2 x+1$?