If you see, the equation
is a circle of radius 2 units. So you can conclude that it passes through (0,2) (2,0) (-2,0) (0,-2).
And the other equation
is a straight line passing through (0,2) and (2,0). You can say this by substituting 0 in x and y respectively.
Hence both the circle and the line meet at (0,2) and (2,0)