# How do you find excluded values for rational expressions?

Jun 17, 2018

See below

#### Explanation:

Let our general rational expression be $f \frac{x}{g} \left(x\right)$

This expression is defined where $g \left(x\right) \ne 0$
[Since we cannot divide by 0]

Hence, the excluded values are where $g \left(x\right) = 0$

Hope this helps!