simple algebra domain question

[CoolWave]

please help
find the domain of the rational function

x+9
--------
x^2+25

[evank15]

all reals i'm pretty sure. i would think it has to do with possible problems in the denominator, of which there are none here.

[bigpooch]

This should be R = {all reals}, if the context is real
functions; otherwise, the complex numbers without +/-5i.