So there is no solution for when y is between 2 and 2 and there are two solutions for when y is greater then 2 and less than 2.
Now lets investigate changing the 1 in the equation Lets first try the values 3, -2, -1, 0, 1, 2, 3 and see what happens.
It looks like all of these graphs are bounded by and the y axis, so lets take the x and y axis away from this picture and see what happens.
As you can see the y-axis was just hiding the other piece of the graph
As you can see by this 3-D graph, the graphis bounded between the green function which are planes representing in 3-D