10.3 (a) Solve the following system of equations by LU decomposition without pivoting X1 +7x2- 4x3 = -51 4x1 - 4x2 +9x3 = 62 12х1 - х2 + 3хз — 8 %3D (b) Determine the matrix inverse. Check your results by verifying that [A][A] = [1].

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