Determinant
Definition
A scalar value computed from a square matrix that encodes certain properties of the matrix. For a 2×2 matrix [[a,b],[c,d]], determinant = ad − bc. A determinant of zero means the matrix is singular (non-invertible).
Example
"For matrix [[3, 2],[1, 4]], determinant = (3×4) − (2×1) = 12 − 2 = 10. Since det ≠ 0, the matrix is non-singular and has an inverse."