matrix the non symmetric part cancels out anyway now we did some math on the board and that feel free to revisit there's no reason to ever consider a non symmetric matrix Sigma because the non symmetric part will just cancel out in that quadratic form alright so we can compute expectations here to expected value of variable X is of course is mu expected deviation of X from the mean is actually entries in Sigma so this is saying expected value of x I minus mu I so how much bigger is the Exide than its mean x how much bigger is xj then its