Given that $A$ is a square matrix of order 3 and $|A| = -2$, then $|\text{adj}(2A)|$ is equal to:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → $2^8$ ##
$|\text{adj}(2A)| = |(2A)|^2$
$= (2^3 |A|)^2$
$= 2^6 |A|^2$
$= 2^6 \times (-2)^2$
$= 2^8$