Find the inverse of the matrix A=(2513)A = \begin{pmatrix} 2 & 5 \\ 1 & 3 \end{pmatrix}A=(2153).
(3−5−12)\begin{pmatrix} 3 & -5 \\ -1 & 2 \end{pmatrix}(3−1−52)
(2/51/31/23/5)\begin{pmatrix} 2/5 & 1/3 \\ 1/2 & 3/5 \end{pmatrix}(2/51/21/33/5)
The matrix is not invertible