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If A be a square matrix of order 3 , such that A = 5 , then A d j - 3 A - 2 is equal to

Correct answer

29.16

Step-by-step solution

A d j - 3 A 2 = - 3 A - 2 2 = 3 6 A - 2 2 = 3 6 × 1 A 4 = 3 6 × 1 25 = 729 25 = 29.16

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