Question 57
Find all pairs $(x, y)$ of positive integers such that
$$
x^3 + y^3 = x^2 + 42xy + y^2.
$$
$$
x^3 + y^3 = x^2 + 42xy + y^2.
$$
MathNet 2017-part-01 — 176 problems (EN–VI) Question 57
Math Olympiad Vault · MathNet 2017-part-01 — 176 problems (EN–VI)