You can
put this solution on YOUR website!
The denominator does not factor, and thus has only
irrational zeros (or roots) that can only be
approximated with calculator as ≈ -2.76231756278576
and ≈ 1.00948009238342. Maybe you copied it wrong
and the denominator was supposed to be a polynomial
that had rational zeros (or roots)
Anyway, the domain of the problem you posted is then
Edwin