Question: Given the equations 2x1 6x2 x3 = 38 3x1 x2 + 7x3 = 34 8x1 + x2

Given the equations

2x1 – 6x2 – x3 = – 38

– 3x1 – x2 + 7x3 = – 34

– 8x1 + x2 – 2x3 = – 20

(a) Solve by Gauss elimination with partial pivoting. Show all steps of the computation.

(b) Substitute your results into the original equations to check your answer.


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