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Question: If \(A = \begin{bmatrix} 4 & 2 \\ 3 & 4 \end{bmatrix}\), then \(|adjA|\)is equal to...

If A=[4234]A = \begin{bmatrix} 4 & 2 \\ 3 & 4 \end{bmatrix}, then ∣adjA∣|adjA|is equal to

A

16

B

10

C

6

D

None of these

Answer

10

Explanation

Solution

4 & - 2 \\ - 3 & 4 \end{bmatrix}$$ $$|adjA| = \left| \begin{matrix} 4 & - 2 \\ - 3 & 4 \end{matrix} \right| = 16 - 6 = 10$$