Finding the Domain of a Rational Function / Fraction with Variable in Denominator

Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Finding the Domain of a Rational Function / Fraction with Variable in Denominator. In this example, I find the domain of a rational function by factoring the denominator.