х+ у3D 1 y = 4. 2х — у %3D 5 |Зх + 4у — 2

Use Gaussian or Gauss-Jordan elimination to solve the system of equations or to show that no solution exists: 10r1 + 15r2 = 1 3x1 + 2x2 -1

Find the LU factorization of A 4 -20 A = 1 T2 || || 5 -26 T - 2 188 50 - L 4 -20 4² -26 and use it to solve the system 1.881

Use Gaussian elimination to find the complete solution to the following system of equations, or show that none exists. 9x1 + 29x2 + X3 = 15 4x, + 13x2 + 2x3 = -7 X, + 3x2 - 3x3 = 5 Select the correct choice below and, if necessary, fillin the answer box(es) to complete your choice. A. The unique solution is X, =, X2 = and X3 = B. The system has infinitely many solutions. The solution is x, = ,X2 = and x, =t. (Simplify your answer. Type an expression using t as the variable.) C. The system has infinitely many solutions. The solution is x, = , X2 =s, and x, =t. (Simplify your answer. Type an expression using s and t as the variables.) D. There is no solution.