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Question
If A = `[(3, 1),(-1, 2)], B = [(1, 0),(0, 2)]`, find A2.
Sum
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Solution
A = `[(3, 1),(-1, 2)]`
A2 = `[(3, 1),(-1, 2)] [(3, 1),(-1, 2)]`
= `[(3 xx 3 + 1 xx (-1), 3 xx 1 + 1 xx 2),(-1 xx 3 + 2 xx (-1), -1 xx 1 + 2 xx 2)]`
= `[(9 - 1, 3 + 2),(-3 - 2, -1 + 4)]`
= `[(8, 5),(-5, 3)]`
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Chapter 8: Matrices - Exercise 8C [Page 164]
