Solve the equation Ax = b by using the LU factorization given for A. Also solve Ax = b by ordinary row reduction. A = y = 4 -7 -4 -4 3 3 12 -5 -9 X = = 1 -1 00 10 3 - 4 1 Let Ly= b and Ux=y. Solve for x and y. 4 -7 -4 0 -4 -1 0 0-1 Row reduce the augmented matrix [A b] and use it to find x. The reduced echelon form of [A b] is, yielding x = 4 - 15 61

Solve the system of linear equations {2x+3y=-15 {4x-3y=10 using the matrix [1/6    1/16]                            [2/9     -1/9]

Express x₁ = 4x₁-x₂ + 3x3 - 5x4 X₂ = 5x₁ + x4 x3 = -√ex₁-7x3 X4 = 0 Write the system of equations using matrix notation. Select the correct choice below and fill in the answer box to complete your choice. (Type an exact answer.) OA. O B. the system of differential equations in matrix notation. O C. extbook X₁' X₂ X3 X4' X₁' X₁ x₂ x2 X3 X3 X4 C X₁ X2 X3 ХА x3 x3 X4 X4 x₁ X₁ X₂' Ask my instructor

-3x +5y = 3 6x +2y=7   Solve using augmented matrix, 3 columns 2 rows