Question 581509
    ___________
3+p/-21-4p+3p^2
Lets rewrite this whole thing so it makes more since to me.
    __________
p+3/3p^2-4p-21
divide by p
    _3p_-13______
p+3/3p^2-4p-21
  -(3p^2+9p)
        -13p-21
      -(-13p-39)
            +18
answer=3p-13 R+18
I hope that helps