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Question
If A = `[(1, 2),(2, 3)] and "B" = [(2, 1),(3, 2)], "C" = [(1, 3),(3, 1)]` find the matrix C(B – A)
Solution
A = `[(1, 2),(2, 3)]`
B = `[(2, 1),(3, 2)]`
C = `[(1, 3),(3, 1)]`
B – A = `[(2, 1),(3, 2)] - [(1, 2),(2, 3)]`
= `[(1, -1),(1, -1)]`
C(B – A) = `[(1, 3),(3, 1)] xx [(1, -1),(1, -1)]`
= `[(1 + 3, -1 - 3),(3 + 1, -3 - 1)]`
= `[(4, -4),(4, - 4)]`.
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