More help hints:[br][br]Enter matrix elements in the spreadsheet and generate the desired matrix by using the color-coded buttons. If your matrix has dimensions different from the options given, simply type the elements and use the List/Matrix tool [icon]/images/ggb/toolbar/mode_createlist.png[/icon]to generate your matrix.[br][br][b]Row Operations[/b][br]In general, you first need to specify the row(s), to which you want to apply the row operation and then a constant (if any). More specifically:[br][br][list][*][i]Multiplication by a non-zero constant:[/i] Enter the row number and then the constant. For example, if you want to replace R[sub]2[/sub] with 5R[sub]2[/sub], you will enter 2 and then 5 when asked to do so.[/*][/list][br][list][*][i]Swapping two rows[/i]: Enter the row numbers (in any order). For example to swap R[sub]1[/sub][math]\longleftrightarrow[/math] R[sub]3[/sub], you will enter 1 and then 3 when asked.[/*][/list][br][list][*][i]Adding a multiple of a row to another row[/i]: Enter the row you want to multiply, then the row you want to add to (replace) and finally enter the constant. For example, to do 3R[sub]1[/sub] + R[sub]2[/sub] [math]\longleftrightarrow[/math] R[sub]2[/sub], you will enter 1, then 2 and then 3.[/*][/list][br]