We are IESO Elortzibar's Bilingual Programme students of the first course of ESO.
Althoug Maths is our main topic, almost anything interesting fits in Frikimaths: sience, music, movies...
Mario I think that you did a diferent exercise in 1 (e)
Yeahhh!! That's right!! O_o Thanks for telling me ;) I have changed the exercise, now you can check the same link and you will get the new version with the updated 1(e) :D
Hi Mario. I don`t understund the 3(e). I don`t know why you put 7 if you already has a second order equiation