# Funky Functional Equation Part II

Algebra Level 5

Find the absolute value of the product of two possible values for $$f(10)$$ given that

$$f(xf(x)+f(y))=y+f(x)^2$$

Where $$x, y \in \mathbb{R}$$ and $$f(x)$$ is a polynomial function.

Note: This question has been edited several times, and is now correct.

See Part I if you enjoyed this problem! :D

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