If needed first write the given function as a single rational expression Then factor the numerator and denominator of R x Select the correct choice below and if necessary fill complete your choice x x 12 O A R x Type your answer in factored form Do not simplify B R x cannot be factored further What is the domain of R x Select the correct choice below and if necessary fill in the answer box to complete your choice OA xx Type an integer or a simplified fraction B xlx Type an integer or a simplified fraction Use a comma to separate answers as needed OC xx 2 Type an integer or a simplified fraction OD The domain is the set of all real numbers Write R x in lowest terms Select the correct choice below and if necessary fill in the answer box to complete your choice A R x Simplify your answer