Use the following matrix for Exercises 9–17:
15. Evaluate |A| by expanding down the third column.
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COLLEGE ALGEBRA: GRAPHS AND MODELS, LOOS
- In Exercises 19–20, solve the matrix equation for X. 1 -1 1 -1 5 7 8. 19. 2 3 0| X = 4 -3 1 1 3 5 -7 2 1 -arrow_forward4 11. 5 3 2 -2 2arrow_forwardCompute the determinants in Exercises 9–14 by cofactor expansions. At each step, choose a row or column that involves the least amount of computation.arrow_forward
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