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3x3 determinant of -2, 3, 8 6, 7, 1 4, 5, 9 ​
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3x3 determinant of -2, 3, 8 6, 7, 1 4, 5, 9
​

User Sasha
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1 Answer

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-2, 3, 8 | -2 3
6, 7, 1 | 6 7
4, 5, 9 | 4 5

Use the diagonal rule:

-2×7×9+3×1×4+8×6×5-(4×7×8+5×1×-2+9×6×3)

=-250
User Magnus
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