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$\"\"$

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First write the dimension of the matrix.

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

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The operation is possible.

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$\"\"$

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Multiply the matrix by 2. \ \

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$\"\"$

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

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$\"\"$ (Simplify)

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$\"\"$

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Multiply the matrix by -4. \ \

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$\"\"$

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$\"\"$ \ \

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$\"\"$ (Simplify)

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$\"\"$

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Perform the operation

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$\"\"$

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$\"\"$ (Simplify)

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$\"\"$

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$\"\"$

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The value of $\"\"$ is $\"\"$

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.

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