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Question
A = `[(1, 2),(3, 4)] and "B" = [(6, 1),(1, 1)], "C" = [(-2, -3),(0, 1)]` find each of the following and state if they are equal. A + CB
Solution
A + CB
= `[(1, 2),(3, 4)] + [(-2, -3),(0, 1)] xx [(6, 1),(1, 1)]`
= `[(1, 2),(3, 4)] + [(-12 - 3, -2 - 3),(0 + 1, 0 + 1)]`
= `[(1, 2),(3, 4)] + [(-15, -5),(1, 1)]`
= `[(1 - 15, 2 - 5),(3 + 1, 4 + 1)]`
= `[(-14, -3),(4, 5)]`
We can say that CA + B ≠ A + CB.
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