9. If the equation $9^{-x^{x}}=4 \cdot 3^{-x^{x}}+m$ has real solutions for $x$, then the range of real values for $m$ is
9. $m \in[-3,0) \quad m=\left(3^{-x^{2}}\right)^{2}-4 \cdot 3^{-x^{2}}$, let $t=3^{-x^{2}}, m=t^{2}-4 t, t \in(0,1]$. It is easy to find that $m \in[-3,0)$