$\"\"$

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For subtracting matrices, their dimension should be equal.

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First write the dimension of the matrix.

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The dimensions of matrix A and B are $\"\"$ .

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The operation 4B $\"\"$ 2A is possible. $\"\"$

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Multiply the matrix B by 4.

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$\"\"$

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

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

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Multiply the matrix A by 2.

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$\"\"$

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

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

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Perform the operation 4B $\"\"$ 2A

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

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$\"\"$ (Subtract corresponding elements)

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

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

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The value of (4B $\"\"$ 2A) is $\"\"$ .