Diagonalize matrix: please check work

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SUMMARY

The discussion centers on the diagonalization of a 2x2 matrix with eigenvalues -4 and 1, and eigenvectors (1/√5)(1/2) and (1/√10)(3/1). The matrix in question is not symmetric, which affects the diagonalization process. The user received feedback indicating that their notation was unclear, particularly regarding the definition of matrix Q and the meaning of λ in the context of the diagonalization formula Q^-1AQ = λ. Clarification on these points is essential for accurate matrix diagonalization.

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Homework Statement



I am pretty sure I went completely wrong but not sure where. Please help!

2 -3
2 -5

Homework Equations



2 -3
2 -5

The Attempt at a Solution



(note: I apologize for poor notation)

eigenvalues = -4, 1
eigenvectors = (1/√5)(1/2), (1/√10)(3/1)

The matrix is not symmetric, thus the diagonal is (Q^-1)(A)(Q) = λ

Без імені.jpg
 
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What you have done looks good but your last line is not at all clear. You have not said what "Q" is. Q^{-1}AQ is a 2 by 2 matrix, not a "diagonal", and you have not said what "\lambda" is intended to mean. Your attachment is correct.
 
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