Punkty osobliwe autonomicznego układu równań
Playing (not only) with mechnaical memory on vintage Mercedes Euklid calculator (by Jaroslav Pochylý).
Warning. Did you try the problem by yourself first? Blind rewriting problem to computer and puting down the answer may have serious negative influence on your education. The optimal way how to use this application is to solve the problem and then check your result against computer generated answer.