Here is a quick "proof" that the eigenvalues of all real matrices are real: False proof
Chapter 6, Problem 10(choose chapter or problem)
Here is a quick "proof" that the eigenvalues of all real matrices are real: False proof Ax = AX gives x T Ax = AX T X xTAx so ).. =-- xTx is real.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer