Process: let (x 2+y 2) (1/2) = a, then a 2+a = l, and a = (l+1/4) (1/2)-65438+solve the equation. 0, excluded by another solution).

So: (x 2+y 2) (1/2) = (l+1/4) (1/2)-1/2 Simplified: y 2 = l-(l+66).

Handmade, hope to adopt, thank you! I don't understand QQ7474492 16.