Which that apply?
but some easy ones that comes to mind are 36/1000 and 9/250
We need to know the definition of the "combined function" h(x). I'm going to guess--by looking at answers--that the function is

making it

This function is undefined wherever the denominator is equal to 0 (division by zero is undefined). Factor the denominator.

The two values of x that make the denominator 0 are 3 and -3, otherwise written

.
Umm what is this supposed to mean more information
Add 3 on both sides of the equation
3x=0
divide 3 on both sides of the equation
x=0