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Question
If A = `[(0, 2),(5, -2)]`, B = `[(1, -1),(3, 2)]` and I is a unit matrix of order 2 × 2, find BA
Solution
BA = `[(1, -1),(3, 2)][(0, 2),(5, -2)]`
= `[(1 xx 0 + (-1)(5), 1 xx 2 + (-1)(-2)),(3 xx 0 + 2 xx 5, 3 xx 2 + 2(-2))]`
= `[(0 - 5, 2 + 2),(0 + 10, 6 - 4)]`
= `[(-5, 4),(10, 2)]`
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