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If A is a symmetric matrix and B is a sk...

If A is a symmetric matrix and B is a skew-symmetric matrix such that
`A + B = [{:(2,3),(5,-1):}]`, then AB is equal to

A

`[(-4,-2),(-1,4)]`

B

`[(4,-2),(-1,-4)]`

C

`[(4,-2),(1,-4)]`

D

`[(-4,2),(1,4)]`

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B
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