# An algebra problem by tannistha mondal

Algebra Level pending

Suppose $$f$$ is a quadratic polynomial, i.e., a polynomial of degree 2, with leading coefficient 1 such that $$f(f(x) + x) = f(x)(x^2 + 786x + 439)$$ for all real number $$x$$. What is the value of $$f(3)$$?

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