Math Chapter Wise Matrices And Determinants English MCQ KVS PGT 2022 Q.The characteristic polynomial of matrix A = 1 2 2 2 1 2 2 2 1 is: Aλ3 −3λ2 +9λ−5 Bλ3 +3λ2 −9λ+5 Cλ3 −3λ2 −9λ−5 Dλ3 +3λ2 −9λ+5 Show answer Correct answer: λ3 −3λ2 −9λ−5