# Math Help - Diagonalizable question

1. ## Diagonalizable question

Show that if a matrix A is diagonalizable, then its trace is the sum of its eigenvalues. Any help would be great I'm having trouble with this proof!

2. ## Re: Diagonalizable question

$trace(PAP^{-1})= trace(A)$.
Trace (linear algebra) - Wikipedia, the free encyclopedia