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If A=[[1 ,-1] , [-1 , 1]], then A^(2)=...

If `A=[[1 ,-1] , [-1 , 1]]`, then `A^(2)=`

A

none of these

B

`[[2 ,-2] , [-2 , 2]]`

C

`[[-2 ,-2] , [-2 , 2]]`

D

`[[-2 ,2] , [2 , -2]]`

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The correct Answer is:
A
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