On Thu, 12 Sep 2013 11:09:21 -0700 (PDT), firstname.lastname@example.org wrote:
>Thank You All for very helpful replies. > >IS there some sort of FREE downloadable utility or website where I could plug in 2 equations and get a lovely elegant solution in terms of one variable only. > >Now that i've been shown how to get the Max Y value, by way of completeness it would great to be able to derive the dx/dy=0 and likewise merge the resulting equation to get the Max X value for the same cumbersome equation:- > >x^4 + y^4 + A(x^2) - A(y^2) + 2(x^2)(y^2) - Bxy + C = 0
Just interchange x and y, then get Max y for the new equation.