Question

If $A=\left[\begin{array}{cc}10& 0\\ 4& 10\end{array}\right]$, then find $\left|A\right|$.

Answer 1

Consider the given matrix.

$A=\left[\begin{array}{cc}10& 0\\ 4& 10\end{array}\right]$

$|A|=(10\times 10)-(0\times 4)$

$|A|=100-0$

$|A|=100$

Hence, this is the answer.