Test Academy | If A is a 2 × 2 matrix and I is an identity matrix of order 2 & A − λI = 0 gives value of λ as –1 & 3 then trace of A2 is equal to _____

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If A is a 2 × 2 matrix and I is an identity matrix of order 2 & A − λI = 0 gives value of λ as –1 & 3 then trace of A2 is equal to ______

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