Construct a `2xx2` matrix `A=[a_(i j)]` whose elements are given by `a_(i j)=((i+2j)^2)/2` .

Explanation

To construct a \(2 \times 2\) matrix \(A = [a_{ij}]\) where the elements are given by the formula \(a_{ij} = \frac{(i + 2j)^2}{2}\), we will follow these steps:

### Step 1: Define the matrix dimensions
Since we need a \(2 \times 2\) matrix, we will have:
- \(i\) can take values \(1\) and \(2\) (for the rows)
- \(j\) can take values \(1\) and \(2\) (for the columns)

### Step 2: Calculate \(a_{11}\)
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