for what values is the following expression undefined x+2/x-5

Answer 1

(x+2)/(x-5) is undefined for x=5, the one value which makes the denominator = 0

or if you really meant (x) + (2/x) - (5), which is technically, the way it's written, following PEMDAS, the order of operations, then x= 0 makes the expression undefined, but odds are the answer you want is x=5.