if for a matrix A, A^2+I=O, where I is t...

if for a matrix `A, A^2+I=O`, where I is the identity matrix, then A equals

A

`{:[(1,0),(0,1)]:}`

B

`{:[(i,0),(0,-i)]:}`

C

`{:[(1,2),(-1,1)]:}`

D

`{:[(-1,0),(0,-1)]:}`

Text Solution

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The correct Answer is:

B

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