PLs answer my question i need help
pls
![PLs answer my question i need helppls class=](https://us-static.z-dn.net/files/d90/3369ac81e74760cd36c16314634a8f4e.png)
-12, 19 = 31
-2, -7 = 5
25, -1 = 26
What exactly does it mean by difference? I'm just confused on what that question is stating.
-TTL