|op|/|om|= square of both sides → get (x2+(YP) 2)/{x2+(ym) 2} = enter 2 → remove the denominator, and move the term to get: x2+(yp) 2 = enter 2 {x. According to the elliptic equation: (yp) 2 = 7-(7x. .

Landlord, calculate slowly and don't get dizzy. This replacement is already very simple, mainly replacing YP as a whole, which is more direct. . I don't know if the coordinate m of point m in your question supplement is known. I think there is something wrong with this assumption. In fact, we can set point P(x, y) and point M(x, y) directly. Now we can directly find the relationship of (x, y). Y 2 = 7-(7x 2)/16 can be obtained from the elliptic equation, and then the equation can be obtained. The answer is the same, but more direct.