Question 47
If the characteristic polynomial of a \(3\times 3\) matrix \(M\) over \(\mathbb{R}\) (the set of real numbers) is \(\lambda^{3} - 4\lambda^{2} + a\lambda + 30\), \(a \in \mathbb{R}\), and one eigenvalue of \(M\) is \(2\), then the largest among the absolute values of the eigenvalues of \(M\) is ______.
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