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Question
Given A = `[(1, 4),(2, 3)]` and B = `[(-4, -1),(-3, -2)]` find the matrix 2A + B
Solution
A = `[(1, 4),(2, 3)]`
B = `[(-4, -1),(-3, -2)]`
2A + B = `2[(1, 4),(2, 3)] + [(-4, -1),(-3, -2)]`
= `[(2, 8),(4, 6)] + [(-4, -1),(-3, -2)]`
= `[(2 - 4, 8-1),(4 - 3, 6 - 2)]`
= `[(-2, 7),(1, 4)]`
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