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The solution of the matrix equation of [...

The solution of the matrix equation of `[{:(x^(2)),(y^(2)):}]-4[{:(2x),(y):}]=[{:(-7),(12):}]=`........

A

`x=1,y=7`

B

`x=-2,y=6`

C

`x=1,y=-2`

D

None of these

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