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Question
Verify that A2 = I when A = `[(5, -4),(6, -5)]`
Solution
A = `[(5, -4),(6, -5)]`
A2 = `[(5, -4),(6, -5)] xx [(5, -4),(6, -5)]`
= `[(25 - 24, -20 + 20),(30 - 30, -24 + 25)]`
= `[(1, 0),(0, 1)]`= I
A2 = I
∴ L.H.S. = R.H.S.
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