Identifying Holes in Rational Functions
Given the rational function  f(x)=\displaystyle \ {f{{\left({x}\right)}}}= x2+13x+36x216x+63\displaystyle \frac{{{x}^{{2}}+{13}{x}+{36}}}{{{x}^{{2}}-{16}{x}+{63}}}   \displaystyle \ \ find any hole(s) of the function.


-9,-4,9,7