Math Help -> Puzzles -> Squares and fourths
x4 + (x+1)4 = y2 + (y+1)2
Source: http://mathforum.org/wagon/spring03/p978.html
Click here for the answer.
The webmaster and author of the Math Help site is Graeme McRae. [home] [email] [search] [Links to Math Sites] [Whiteboard]