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Mathematics about coordinates in the second day of junior high school
Yes, in fact, the coordinate system to be studied in the future has four quadrants (that is, four areas are separated by a cross), so all x y are positive and negative. For example, the upper right is all positive, the upper left is X negative Y positive, the lower left is all negative, and the lower right is X positive Y negative.

So the coordinates can be positive or negative. But as you said, it represents four points. (2,3)(-2,3)(2,-3)(-2,-3)