Question

finding the L matrix in an LU factorization? Example: w-x-2y+3z=0 , 2w - 2x +6y +6z=0, -2w+x-4y-3z=0, 3w-2x+9y+10z=0

Answer 1

where did u stuck

Answer 2

first you need to make form a matrix form of Ax=0 use these three equations and form a matrix , then start row elimination but save your elimination matrices until you form an upper triangular matrix U the you need to inverse your elimination matrices and multiply them by each other to find L= lower triangular matrix ,, A=LU=(E)^-1 U.. these procedures are the basics of liner Algebra in the second chp of liner algebra book