7 -2 1 Let A = -2 10-2 b 1-2 7 =[ 6 12 18 Compute,...

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7 -2 1 Let A = -2 10-2 b 1-2 7 =[ 6 12 18 Compute, by hand, the eigenvalues and eigenvectors of A, and use them to solve Ax = b for x (use the "spectral method"). 7 -2 1 Let A = -2 10-2 b 1-2 7 =[ 6 12 18 Compute, by hand, the eigenvalues and eigenvectors of A, and use them to solve Ax = b for x (use the "spectral method").