Problem
The function $f$ is defined as follows. \[ f(x)=\frac{x^{2}+11 x+10}{x^{2}-64} \] Find $f(-9)$
Solution
Step 1 ：The function $f$ is defined as follows: \[f(x)=\frac{x^{2}+11 x+10}{x^{2}-64}\]
Step 2 ：We are asked to find the value of the function $f(x)$ at $x = -9$. To do this, we substitute $x = -9$ into the function.
Step 3 ：After substituting $x = -9$ into the function, we simplify to get $f(-9) = -0.47058823529411764$
Step 4 ：So, the value of the function $f(x)$ at $x = -9$ is \(\boxed{-0.47058823529411764}\)
