||'''Book'''|| Linear Algebra ||
 ||'''Author'''|| Gilbert Strang ||
 ||'''Edition'''||  ||

/* code_begins */

{{{
A=matrix(QQ,[[1,2,-2,0],[2,3,-4,1],[-1,-2,0,2],[-0,2,5,3]])
A.add_multiple_of_row(1,0,-2)
A.add_multiple_of_row(2,0,1)
A.add_multiple_of_row(3,1,2)
A.rescale_row(3,0.2)
A.rescale_row(2,0.5)
A.add_multiple_of_row(3,2,1)
A.det()
B=matrix([[2,-1,0,0],[-1,2,-1,0],[0,-1,2,-1],[0,0,-1,-2]])
B.rescale_row(1,2)
B.add_multiple_of_row(1,0,1)
B.swap_rows(1,2)
B.add_multiple_of_row(2,1,3)
B.swap_rows(2,3)
B.add_multiple_of_row(3,2,4)
B.det()
}}}

/* code_ends */

 * '''Solution by''': 
 *<yedukondalu>, <student>, <Prakasam engineering College>
   *<n srija> <student>, <Prakasam engineering College>
   *<triveni>, <student>, <Prakasam engineering College>
  
   *<siva latha>, <student>, <Prakasam engineering College>