# Math Help - Just a simple question

1. ## Just a simple question

I just have a small question concerning holes in rational functions and when do they occur.

Thank You

2. Originally Posted by ih8mathes
I just have a small question concerning holes in rational functions and when do they occur.

Thank You
They occur when the numerator and denominator of the rational function have a common factor. If $(x - a)$ is a common factor then there's a hole in the graph at $x = a$.