Can anyone please teach me fermats infinite descend.. or provide me with all the integral solution of the equation. X^2+Y^2+Z^2+U^2=2XYZU

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TopNewest@Mursalin Habib and @Jubayer Nirjhor did a great writeup, which you can find in the Fermat's Method of Infinite Descent Wiki.

You can explore other ways of solving Diophantine Equations from the Number Theory skill maps too. – Calvin Lin Staff · 1 year, 5 months ago

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