Algebra
posted by Cory .
Trying to figure out how to find all numbers for which the rational expression is undefined.
9/2z+5
Is the answer 5/2 or 10/9?
I made a mistake in my typing when I asked the question earlier.

9/(2z+5) is undefined when z = 5/2
the way you typed it
9/2z+5 is undefined if z = 0