The matrices are .
The dimension of the first matrix is and the dimension of the second matrix is .The two matrices have the different dimensions, so the operation cannot be performed.
The solution is impossible.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=561e713a1038b5097506b1403e631918.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=02cc88497928e9926ce789d08234a685.png\")
and the dimension of the second matrix is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=da0e7b778f89e18cbeda1e0ed2c1d3e0.png\")
.The two matrices have the different dimensions, so the operation cannot be performed.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")