ISRO Electrical Engineering (EE) 2020 - Question 20

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The characteristic equation of a 3 × 3 matrix P is defined as : |λI - P| = λ^3 + λ^2 + 2λ + 1 = 0. "I" denotes identity matrix, then inverse of matrix P will be :

  • A. P^2 + P + 2I
  • B. P^2 + P + I
  • C. -(P^2 + P + I)
  • D. -(P^2 + P + 2I)

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