Posted by maegan on Sunday, May 30, 2010 at 11:29am.
Find all numbers for which the rational expression is undefined.
r^38r/r^225

algebra  bobpursley, Sunday, May 30, 2010 at 11:42am
If you have (r^225) in the denominator, then r=+ 5 is not allowed. It is not allowed to divide by zero.