There are these three quadratic equations:

(x−x1)2+(y−y1)2+P1⋅h2=0 .. (1)

(x−x2)2+(y−y2)2+P2⋅h2=0 .. (2)

(x−x3)2+(y−y3)2+P3⋅h2=0 .. (3)

where we know the values of...