[Q8] (Section 3.2: Orthogonal Matrices, Rotators, Reflectors; Exercise 3.2.14) Use a QR decomposition to solve the linear system: 23 5 7 where R is upper-triangular and where as an appropriate 2 x 2 (Givens) rotation. (Hint: Follow closely Example 3.2.13.) x1 X2 = 12 29

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