Question 71
Find all positive integers $n$ such that
$$
n^4 - 4n^3 + 22n^2 - 36n + 18
$$
is a perfect square.
$$
n^4 - 4n^3 + 22n^2 - 36n + 18
$$
is a perfect square.
MathNet 2002 — Part 01 Question 71
Math Olympiad Vault · MathNet 2002 — Part 01
Math Olympiad Vault · MathNet 2002 — Part 01