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0 votes
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in Mathematics by (48.5k points)

If A = [(3,1),(-1,2)] then A2 -5A is equal to 

(1) – I

(2) – 7I

(3) I

(4) 7I

1 Answer

+1 vote
by (52.4k points)
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Best answer

Correct option (2) – 7I

Explanation:

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