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MathNet 2020 — Math Olympiad Vault — Part 04 Question 14

Math Olympiad Vault · MathNet 2020 — Math Olympiad Vault — Part 04

Question 14

Find all functions $f:\mathbb R\to\mathbb R$ satisfying
$$f(x^2y)+2f(y^2)=(x^2+f(y))f(y)$$
for all $x,y\in\mathbb R$.