Respuesta :

smmwaite
To get the determinant of a 2*2 matrix, you subtract the product of the leading diagonal from the secondary diagonal.


In the matrix above, the product of the secondary diagonal is (4×5) = 20.
The product of the leading diagonal is (-2×3) = -6.

∴ determinant(Δ) = (-6) - 20 = -26

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