The determinant of matrix m can be represented symbolically as det (m). [substeps] For a 3x3 matrix, find the determinant by first to review finding the determinant of a matrix, see find the determinant of a 3x3 matrix.
[header] How to find the inverse of a 3x3 matrix [title] Check the determinant of the matrix. [step] You need to calculate the determinant of the matrix as an initial step. If the determinant is 0, then your work is finished, because the matrix has no inverse.