What is the value of $\begin{vmatrix}3 & 5 \\ 2 & 4\end{vmatrix}$?

Explanation

1. 01

   For a 2 × 2 determinant, multiply down the leading diagonal and subtract the product of the other diagonal.

2. 02

   $3(4) - 5(2) = 12 - 10 = 2$.