If A is a square matrix such that A^(2)=...

If A is a square matrix such that `A^(2)= I`, then
`(A-I)^(3)+(A+I)^(3)-7A` is equal to

A

B

`I-A`

C

`I-A`

D

3A

Verified by Experts

The correct Answer is:

A

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