Question 83594
  
  {{{(x^2-13x+42)/(x^2-36)}}}.  Here you have to factorise both the denominator and the numerator. By doing so, you get
  
   {{{((x-6)(x-7))/((x+6)(x-6))}}} = {{{(cross((x-6))(x-7))/((x+6)cross((x-6)))}}} =  {{{(x-7)/(x+6)}}}  Answer.
   
    Is this clear to you now? Pls let me know.


gsm