Question 1089618
Do you want g(x) in terms of f(x)?

Assuming that is the case:

{{{g(x) = 8/(x-10) = (8/(x-10))*((x+9)/(x+9)) = 8(x+9)/((x-10)(x+9)) = (8/(x+9))*((x+9)/(x-10)) }}}

So  {{{ highlight(g(x) = f(x)*((x+9)/(x-10))) }}} , {{{ x <>-9 }}}, {{{ x<>10 }}}