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Question
Compute the indicated product.
`[(1, -2),(2, 3)][(1, 2, 3),(2, 3, 1)]`
Sum
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Solution
`[(1, -2),(2, 3)][(1, 2, 3),(2, 3, 1)]`
= `[(1 xx 1 + (-2)xx2, 1 xx 2(-2) xx 3, 1 xx 3(-2) xx 1), (2 xx 1 + 3 xx 2, 2 xx 2 + 3 xx 3, 2 xx 3 + 3 xx 1)]`
= `[(1 - 4, 2 - 6, 3 - 2),(2 + 6, 4 + 9, 6 + 3)]`
= `[(-3, -4, 1),(8, 13, 9)]`
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Chapter 3: Matrices - EXERCISE 3.2 [Page 58]
