$\"\"$

For subtracting matrices, their dimension should be equal.

First write the dimension of the matrix.

The dimensions of matrix D and B are 3 $\"\"$ 2.

The operation (D – B) is possible. $\"\"$

Perform the operation D – B.

$\"\"$ (Substitute the values of D and B)

$\"\"$ (Subtract corresponding elements)

$\"\"$ (Simplify) $\"\"$

D – B $\"\"$ .