![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
For subtracting matrices, their dimension should be equal.
\First write the dimension of the matrix.
\The first matrix is, ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=945581c7c80ffd35fc306c29f5e54a7b.png\")
The matrix has 2 row and 3 columns, so dimensions of matrix are ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9b9c7cdc1dfccf217e598039b56c8ed4.png\")
.
The second matrix is, ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7a89f2ecb38b4f587e99856022e6a1c5.png\")
The matrix has 3 row and 3 columns, so dimensions of matrix are ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9ee2f93d2de4eb626e0320c8367c6a07.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
The dimensions of matrix are not equal.
\The operation of addition is impossible.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The operation of addition is impossible.