Calculatrice de Déterminant de Matrice 2x2 Gratuite

Calculez le déterminant d'une matrice 2x2. Entrez les quatre éléments et obtenez le résultat ad - bc.

Det

5.0000

Trace7.0000
Invertible1
Voir la formule →

Formule

2×2 Matrix Determinant

Formula

For matrix [[a, b], [c, d]]:

det = ad - bc

Properties

  • If det = 0, the matrix is singular (not invertible)
  • If det ≠ 0, the matrix is invertible
  • det gives the area scaling factor of the linear transformation
  • sign of det indicates whether orientation is preserved (+) or reversed (-)

    • Exemple Résolu

    Find the determinant of [[3, 7], [1, 4]].

    1. 01det = (3)(4) - (7)(1)
    2. 02= 12 - 7
    3. 03= 5
    4. 04Since det ≠ 0, the matrix is invertible

    Questions Fréquentes

    What is the determinant?

    The determinant is a scalar value computed from a square matrix. For 2×2 matrices, det = ad - bc. It indicates whether the matrix is invertible and the scaling factor of the transformation.

    What does it mean when the determinant is zero?

    A zero determinant means the matrix is singular (not invertible). The columns are linearly dependent, and the transformation collapses space.

    How is the determinant used?

    Determinants are used to solve systems of linear equations (Cramer's rule), find areas/volumes, check invertibility, and compute eigenvalues.

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