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2. (8 points) Let B be the matrix given to the right. Calculate det(B) by expanding through the second row and again by expanding through the third column. (All work must be shown by hand.) 5 5 4 -3 -3 60

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5 3 -t ㄣ ろ ysecond now со 3 CIC (2)4- 3 3 -3 C -14

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