Question

The value of det$(A^2-2A)$,If $A=\begin{pmatrix} 1 & 3 \\\[0.3em] 2 &1 \end{pmatrix}$,is

• A. $5$
• B. $-5$
• C. $25$
• D. $-25$

Answer 1

Answer: (C)

$25$

Answer 2

The correct option is (C): $25$