Question: Question 1 - 15 marks You should be able to answer this question after studying Unit 9. Give sufficient details of your working to make

Question 1 - 15 marks You should be able to answer this question after studying Unit 9. Give sufficient details of your working to make it clear that you have not used any software or calculator that can perform matrix manipulation. For example, in part (a), show explicitly how you calculated at least one element of each matrix answer. (a) Let 2 Evaluate each of the following expressions, if possible. Where evaluation is not possible, explain why not. (i) AB (ii) BA (ili) C' (iv) BAC (v) 3AB - 20. [10] (b) Use a matrix method to solve the following system of linear equations: 6r + 8y = -5 -2x - 4y = 3. (5]

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