Math Chapter Wise Matrices And Determinants English MCQ KVS PGT 2023 Q.A matrix A = α β γ −α is such that A2 = I, then: A1 + α2 + βγ = 0 B1 – α2 + βγ = 0 C1 – α2 – βγ = 0 D1 + α2 – βγ = 0 Show answer Correct answer: 1 – α2 – βγ = 0