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Write the cofactor of a(12) in the matri...

Write the cofactor of `a_(12)` in the matrix `[2-3 5 6 0 4 1 5-7]`

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Given, `[[2,-3, 5],[ 6 ,0 ,4],[ 1 ,5-,7]]`
From the matrix `a_(12)=-3`
For cofactor of -3, eliminate first row and second column in the matrix
cofactor of `-3=[[6,4],[1,-7]]`
Cofactor of `-3 = (6 × -7) – (4 × 1) `
Cofactor of` -3 = -42 – 4 `
Cofactor of `-3 = -46`
...
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RD SHARMA-DETERMINANTS-Solved Examples And Exercises
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  3. Write the cofactor of a(12) in the matrix [2-3 5 6 0 4 1 5-7]

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