Doing the computations by hand, find the determinant of the matrix below

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2022-05-28

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Doing the computations by hand, find the determinant of the matrix below.

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Nesma

2022-05-28

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We’ll expand about the first row since there are no zeros to exploit,

= (−2)((−2)(2) − 1(4)) + (−3)((−4)(2) − 1(2)) + (−2)((−4)(4) − (−2)(2))

= (−2)(−8) + (−3)(−10) + (−2)(−12) = 70

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