Welche Matrix?: z.B. die Erweiterte zum Gaußen
===>
https://www.geogebra.org/classic#cas
LG:{x1+2*x2 - x3+3*x4-4*x5=1, 2*x1+ x2+3*x3- x4+ 4*x5=9 , 3*x2-5*x3+7*x4-12*x5=-7 ,3*x1 +7*x3-5*x4+12*x5=17 ,x1- x2+4*x3-4*x4+8*x5=8}
Substitute(LeftSide(LG)+RightSide(LG)b, {x1,x2,x3,x4,x5,b}=Identity(6))
\(\small \left(\begin{array}{rrrrrr}1&2&-1&3&-4&1\\2&1&3&-1&4&9\\0&3&-5&7&-12&-7\\3&0&7&-5&12&17\\1&-1&4&-4&8&8\\\end{array}\right)\)