SOLUTION: Find the determinant of this 3x3 matrix using expansion by minors about the second row 0 -4 6 A= 5 0 0 9 -2 7

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Question 591658: Find the determinant of this 3x3 matrix using expansion by minors about the second row
0 -4 6
A= 5 0 0
9 -2 7
Answer by Alan3354(69443) About Me  (Show Source):
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Find the determinant of this 3x3 matrix using expansion by minors about the second row
0 -4 6
A= 5 0 0
9 -2 7
============
= -5*(-4*7 - (-2*6)) = -5*(-28 + 12) = 80 (the other minors are zeroes)