Merge pull request #428 from Quantum-Software-Development/FabianaCampanari-patch-1

Update README.md

Author: FabianaCampanari

README.md

@@ -668,6 +668,10 @@ $3x_1 \leq 90
 
 ### $x_1 \geq 0, \quad x_2 \geq 0$
 
+```latex
+x_1 \geq 0, \quad x_2 \geq 0
+```
+