SOLUTION: find the determinant of the matrix A=(9 6 2 1 2 3 4 5 7)

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Question 773356: find the determinant of the matrix A=(9 6 2
1 2 3
4 5 7)
Answer by Alan3354(69443) About Me  (Show Source):
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find the determinant of the matrix A=
9 6 2
1 2 3
4 5 7
------------
Det = 9*(14-15) - 6*(7-12) + 2*(5-8) = -9 +30 -6
= 15