I have a question regarding the poles of a transfer function given a state space diagram. There is a formula for it. This is my answer:

[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/z3mpyo5n.png

Unfortunately, the answer is apparently long. The answer says that the pole of the transfer function G(s) is located at -3. So it doesn't mention the -2.

Anyone know where I went wrong?