Question 123
Find all non-constant polynomials $P(x)$ and $Q(x)$ with real coefficients satisfying the equality $P(Q(x)) = P(x)Q(x) - P(x)$.
MathNet 2019-part-01 — 184 problems (EN–VI) Question 123
Math Olympiad Vault · MathNet 2019-part-01 — 184 problems (EN–VI)