The calculator will find the determinant of the square
2x
2 matrix
[6879], with steps shown.
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Cofactor Matrix Calculator
Solution
The determinant of a 2x2 matrix is ∣∣acbd∣∣=ad−bc.
∣∣6879∣∣=(6)⋅(9)−(7)⋅(8)=−2
Answer
∣∣6879∣∣=−2A