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Question
If A = `[(1, 4),(2, 1)]`, B = `[(-3, 2),(4, 0)]` and C = `[(1, 0),(0, 2)]`, simplify : A2 + BC.
Solution
A2 = `[(1, 4),(2, 1)][(1, 4),(2, 1)]`
= `[(1 + 8, 4 + 4),(2 + 2, 8 + 1)]`
= `[(9, 8),(4, 9)]`
BC = `[(-3, 2),(4, 0)][(1, 0),(0, 2)]`
= `[(-3 + 0, 0 + 4),(4 + 0, 0 + 0)]`
= `[(-3, 4),(4, 0)]`
A2 + BC = `[(9, 8),(4, 9)] + [(-3, 4),(4, 0)]`
= `[(6, 12),(8, 9)]`
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