Which expression is represented by the model?
+
-X
+
O X-3
O X+3
O -x-3
O-X+3
first answer gets best marks
![Which expression is represented by the modelXO X3O X3O x3OX3 first answer gets best marks class=](https://us-static.z-dn.net/files/df6/178fd16f1c22561f7b1c48b9c4a9fdde.jpg)