Evaluate `|(2, 4),(-1,2)|`

Explanation

To evaluate the determinant `|(2, 4), (-1, 2)|`, we will follow the standard formula for calculating the determinant of a 2x2 matrix.

### Step-by-Step Solution:

1. **Identify the elements of the determinant**:
The given determinant is:
\[
\begin{vmatrix}
...