Math Teacher on Instagram: "♾️📐 Determinant of a Matrix ♾️ is more than just a number — it plays a key role in linear algebra and problem solving. The determinant helps us determine whether a matrix is invertible (if det ≠ 0, the inverse exists; if det = 0, the matrix has no inverse), and it is essential when solving systems of linear equations using methods like Cramer’s Rule. Geometrically, the determinant represents the scaling factor of area or volume after a linear transformation, and a ze