Find x and y if $\begin{bmatrix} -2 & 0 \ 3 & 1 \end{bmatrix} \begin{bmatrix} -1 \ 2x \end{bmatrix} + 3 \begin{bmatrix} -2 \ 1 \end{bmatrix} = 2 \begin{bmatrix} y \ 3 \end{bmatrix}$.

If A = $\begin{bmatrix} 3 & 0 \ 5 & 1 \end{bmatrix}$ and B = $\begin{bmatrix} -4 & 2 \ 1 & 0 \end{bmatrix}$, find A² – 2AB + B².

The total number of elements in an m × n matrix is:

1. m + n

2. mⁿ

3. mn

4. 2^{m + n}

The matrix, A = $\begin{bmatrix} 3 & 4 & -8 \ 2 & 0 & -2 \ 1 & 7 & -9 \end{bmatrix}$, then the value of a₂₃ is:

1. 2

2. -8

3. -9

4. -2