The determinant of the matrix is -9, so the matrix is invertible.
To calculate the inverse, use Gauss elimination (Gaussian elimination - Wikipedia, the free encyclopedia) or Analytic solution (Invertible matrix - Wikipedia, the free encyclopedia)
The determinant of the matrix is -9, so the matrix is invertible.
To calculate the inverse, use Gauss elimination (Gaussian elimination - Wikipedia, the free encyclopedia) or Analytic solution (Invertible matrix - Wikipedia, the free encyclopedia)