What real values of x are not in the domain of
\(f(x)=\frac{1}{|x^2+3x-4|+|x^2+9x+20|}\)?
(I think this was answered somwhere else on this website but its wrong so just wanted to repost.)
:)
The real values that are not in the domain are 1, -4, and -5.
+273 
