https://www.chegg.com/homework-help/questions-and-answers/1-find-sum-integers-n-property-n-n-2021-perfect-squares-2-given-function-p-x-ax-5-bx-4-cx--q83106499

Bratin_Dasgupta wrote: https://www.chegg.com/homework-help/questions-and-answers/1-find-sum-integers-n-property-n-n-2021-perfect-squares-2-given-function-p-x-ax-5-bx-4-cx--q83106499 I believe that there is no point in linking to a non free source, as we cannot see the answer without having registered

$n=x^2$, and $n+2021=y^2$, so $y^2-x^2=2021$ so $(y-x)(y+x)=2021$ and the rest is easy