Please help solve.

2-36 4 Follow the steps for graphing a rational function to graph the function H(x)= . x - 81 If needed, first write the given function as a single rational expression. Then, factor the numerator and denominator of H(x). Select the correct choice below and, if necessary, fill in the answer box to complete your choice ) A, Hx)=| | (Do not simplify.) () B. H(x) cannot be factored further. What is the domain of H{(x)? Select the correct choice below and, If necessary, fill in the answer box to complete your choice O A {x#| ) (Type an integer or a simplified fraction. Use a comma to separate answers as needed.) O B. {xxz| } (Type an integer or a simplified fraction ) Oc. {x|x