
Re: Building an Equation to find (Maximum Y) ie Highest Point on a curve!
Posted:
Sep 11, 2013 5:40 PM


Am 11.09.2013 19:46, schrieb mervynmccrabbe@gmail.com: > On Wednesday, September 11, 2013 4:28:51 PM UTC+1, mervynm...@gmail.com wrote: >> x^4 + y^4 + A(x^2)  A(y^2) + 2(x^2)(y^2)  Bxy + C = 0 >> > > (***) 5x^4 + y^4 + 3Ax^2  Ay^2 + 6x^2y^2 + C = 0 > >> then I could manage the rest. >  > Thank You Thomas > (***) 5x^4 + y^4 + 3Ax^2  Ay^2 + 6x^2y^2 + C = 0 > Can you handle (***)? This is a quadratic equation in X=x^2 and Y=y^2. > > On Reflection No I can not handle an equation with both variables still in it. Any advice?
I made a mistake. According to may proposal you have to multiply by x and _subtract_ from the original equation. But it leads into a dead end. Sorry, don't see how that leads to an easy algebraic solution.
 Thomas Nordhaus

