Let f(x) = 2x2 + x − 3 and g(x) = x − 1. Find f(x) • g(x).

Simply place the f(x) polynomial over g(x) to get the f(x) / g(x) result. Since polynomials have an infinite domain, the only gap you will get comes from the denominator equaling zero. That happens when:

X - 1 = 0

   +1    +1

   X   = 1

So the domain is: D: X≠ 1