1. The problem statement, all variables and given/known data is( X^2 )y + (Y^2)x = 6, then the second derivative at the point (1,3) is ? 2. Relevant equations 3. The attempt at a solution I don't see how this is possible, when I plug in 1 and 3 it comes out as 9 = 6 which isn't true. Can someone tell me if this is wrong? or if the problem is written badly?