$\"\"$

\

For subtracting matrices, their dimension should be equal.

\

First write the dimension of the matrix.

\

The dimensions of matrix are $\"\"$ .

\

The operation is possible. $\"\"$

\

Multiply the matrix by $\"\"$ 2.

\

$\"\"$

\

$\"\"$ (Multiply each element by $\"\"$ 2)

\

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

\

Multiply the matrix by 4.

\

$\"\"$

\

$\"\"$ (Multiply each element by 4)

\

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

\

Perform the operation

\

$\"\"$ $\"\"$

\

$\"\"$ (Subtract the elements)

\

$\"\"$ (Product of two same signs is positive)

\

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

\

The value of is $\"\"$ .