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Question
If A = `[(2, 0),(-3, 1)]` and B = `[(0, 1),(-2, 3)]` find 2A – 3B
Solution
A = `[(2, 0),(-3, 1)]`
B = `[(0, 1),(-2, 3)]`
∴ 2A – 3B = 2`[(2, 0),(-3, 1)] -3[(0, 1),(-2, 3)]`
= `[(4, 0),(-6, 2)] -[(0, 3),(-6, 9)]`
= `[(4 - 0, 0 - 3),(-6 + 6, 2 - 9)]`
= `[(4, -3),(0, -7)]`.
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