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Express the matrix A=[{:(2,4,-6),(7,3,5)...

Express the matrix `A=[{:(2,4,-6),(7,3,5),(1,-2,4):}]` as the sum of a symmetric and a skew- symmetric matrices.

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The correct Answer is:
`[{:(2, (11)/(2),-(5)/(2)),((11)/(2),3,(3)/(2)),(-(5)/(2),(3)/(2),4):}]+[{:(0,-(3)/(2),-(7)/(2)),((3)/(2),0,(7)/(2)),((7)/(2),-(7)/(2),0):}]`
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