If A+I(3)={:[(1,3,4),(-1,1,3),(-2,-3,1)]...

If `A+I_(3)={:[(1,3,4),(-1,1,3),(-2,-3,1)]:},` evaluate `(A+I_(3))(A-I_(3)),` where `I_(3)` represents `3xx3` unit matrix.

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The correct Answer is:

`{:[(-12,-12,9),(-6,-13,-4),(3,-6,-18)]:}`

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