Follow the steps for graphing a rational function to graph the function Upper H left parenthesis x right parenthesis equals StartFraction x cubed minus 27 Over x squared minus 81 EndFraction . Question content area bottom Part 1 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. H(x)equals StartFraction left parenthesis x minus 3 right parenthesis left parenthesis x squared plus 3 x plus 9 right parenthesis Over left parenthesis x minus 9 right parenthesis left parenthesis x plus 9 right parenthesis EndFraction (Type your answer in factored form. Do not simplify.) Your answer is correct.B. H(x) cannot be factored further. Part 2 What is the domain of H(x)? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. StartSet x|x not equals nothing EndSet (Type an integer or a simplified fraction. Use a comma to separate answers as needed.) B. StartSet x|x less than nothing EndSet (Type an integer or a simplified fraction.) C. StartSet x|x greater than or equals nothing EndSet (Type an integer or a simplified fraction.) D. The domain is the set of all real numbers