A2 = A.A Now, A3 = A2. ANow, A3 – 6A2 + 7A + 2I Therefore, A3 – 6A2 + 7A + 2I = 0

Q. 164.1( 42 Votes )

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Answer :

A² = A.A

Now, A³ = A². A

Now, A³ – 6A² + 7A + 2I

Therefore, A³ – 6A² + 7A + 2I = 0

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