1. The problem statement, all variables and given/known data I have matrix F=(11,1, -i1,2, i2,1, 12,2) I calculated the characteristic polynomial to be x2-2x The question is to find the inverse of F 2. Relevant equations I am having a hard time trying to get the inverse out of this. I am used to dealing with real matrices so this may be the source of my error. I have done these with the usual case being that there was a constant term in the polynomial which one could get on the other side of the equality and get the inverse easily. 3. The attempt at a solution I am ending up with something like X2=2x and then multiplying by x-1 and ending up with x=2. What am I missing here? Side note (new guy question) could someone point me into the direction of an explanation of how to do math notation of this forum such as matrices and similar?