NumberTheoryBasic
PolynomialAndEquation
Exeter
Basic
2015
For how many ordered pairs $(x, y)$ of integers satisfying $0 \le x$, $y \le 10$, and $(x + y)^2 + (xy - 1)^2$ is a prime number?
The solution for this problem is available for
$0.99.
You can also purchase a pass for all available solutions for
$99.