2019 USAMO Problems/Problem 6
Problem
Find all polynomials 
with real coefficients such that ![\[\frac{P(x)}{yz}+\frac{P(y)}{zx}+\frac{P(z)}{xy}=P(x-y)+P(y-z)+P(z-x)\]](http://latex.artofproblemsolving.com/2/1/b/21b97a1d7f99072ab6e0a4d493fbfa30f7e7d32a.png)
holds for all nonzero real numbers 
satisfying 
.
Solution
See also
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