If A = 2 - 3 - 4 1 , then Adj 3 A 2 + 12 A is equal to:

Question

If A = 2 - 3 - 4 1 , then Adj 3 A 2 + 12 A is equal to:, 72 - 84 - 63 51, 51 63 84 72, 51 84 63 72, 72 - 63 - 84 51

MARKS App · Accepted Answer

Given, A = 2 - 3 - 4 1 ⇒ A 2 = 2 - 3 - 4 1 2 - 3 - 4 1 ⇒ A 2 = 4 + 12 - 6 - 3 - 8 - 4 12 + 1 ⇒ A 2 = 16 - 9 - 12 13 ⇒ 3 A 2 = 48 - 27 - 36 39 and 12 A = 24 - 36 - 48 12 ∴ 3 A 2 + 12 A = 72 - 63 - 84 51 Adj 3 A 2 + 12 A = 51 84 63 72 T = 51 63 84 72

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