6. Assume that a 3 × 3 matrix A has three eigenvalues A₁, A2 and λ3. If A₁ = A₂ = 2, A3 = 6 and the trace of A is 5 + x. Then x is equal to (a) 5 (b) 4; (c) 3; (d) 2; (e) None of these

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