Answer:
ighhhhhhhhhhhh
Step-by-step explanation:
Janine's example of the origin is correct; however, not all x-coordinates that are <em />0 lie on the x-axis. For example, the coordinate (0,5) describes a point of a plane that is on the Y-axis only, but the x-coordinate is 0. In fact, the only x-coordinate that is 0 and on the x-axis is the origin.
Hope I could help! If the answer isn't correct, or it isn't the answer you are looking for, please let me know! Have a good one.
18x^4+72x^3 is the answer to your question