Update README.md

Signed-off-by: Fabiana 🚀  Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

README.md

@@ -294,7 +294,13 @@ The **graphical method** for solving simple linear programming (LP) problems inv
     *   For a **maximization** problem, the vertex that yields the **largest** value of the objective function is the optimal solution [1, 6].
     *   For a **minimization** problem, the vertex that yields the **smallest** value of the objective function is the optimal solution [2, 7].
 
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+## Possible Scenarios
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+*   **Unique Optimal Solution:** The objective function achieves its maximum or minimum value at a single vertex of the feasible region [3, 5, 6].
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