Calculate the Following Limit(s) If They Exist $\lim _ { x \rightarrow 5 }$

Short Answer

Calculate the following limit(s) if they exist.
- $\lim _ { x \rightarrow 5 }$ $\frac { x ^ { 2 } - 8 x + 15 } { x ^ { 2 } - 7 x + 10 }$ Enter your answer as just a fraction in lowest terms or an integer, or the words "does not exist".