Solve the equation Ax = b by using the LU factorization given for A. Also solve Ax = b by ordinary rowreduction.A =y =4 - 7- 4 312 - 5X =43-9=1-100103 - 4 1Let Ly = b and Ux=y. Solve for x and y.4 -7 -40 -4 - 10 0 - 1Row reduce the augmented matrix [A b] and use it to find x.The reduced echelon form of [A b] isyielding x =4- 1561

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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