If A=[(2,-1),(-1,2)] and l is the unit m...

If `A=[(2,-1),(-1,2)]` and `l` is the unit matrix of order 2, then `A^(2)` equals to

A

4A-3I

B

3A-4I

C

A-1

D

A+1

Text Solution

Verified by Experts

The correct Answer is:

A

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