Algebraic numbers are a subset of complex numbers that are roots of non-zero polynomial equations with rational coefficients. In other words, a complex number \( \alpha \) is considered algebraic if there exists a polynomial \( P(x) \) with \( P(x) \in \mathbb{Q}[x] \) (the set of all polynomials with rational coefficients) such that \( P(\alpha) = 0 \).
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