Find all values that are not in the domain of f/g

Question

F(x)=(-2x+x)(-6+x)

g(x)=-1-3x

Answer 1

f(x)/g(x) is a rational function

This is undefined when the denominator is zero, ie g(x) = 0, 1-3x = 0, x = 1/3

So the domain is all real numbers except for 1/3

In interval notation this is (-∞ , 1/3) ∪ (1/3, ∞)