Equations of Circles (V2): Open Middle Problem
Source: Robert Kaplinsky
![Source: Robert Kaplinsky](https://beta.geogebra.org/resource/kj8puzgc/UeXZVo2b7RuGE5Ak/material-kj8puzgc.png)
In the app below, the green check mark indicates no two values have the same absolute value.
![In the app below, the green check mark indicates no two values have the same absolute value.](https://beta.geogebra.org/resource/msuewj75/XdwiUsZdLR3L6jzN/material-msuewj75.png)
In the app below, the red "X" indicates at least two values have the same absolute value.
![In the app below, the red "X" indicates at least two values have the same absolute value.](https://beta.geogebra.org/resource/cdkfz58f/QHIXTFo0TLNoxGxo/material-cdkfz58f.png)