Russian l can you solve?? l Nice Olympiad Math Algebric Problem

[@franciscoborquezk.155]

You shouldn't have eliminated one x, for it is a cubic function, and therefore look for three (3) solutions. Even if the solution isn't applicable

[@VICKEYKUMAR-e3s]

But I there will be 3 values of X as power of X = 3 , so 3 solutions ?

[@Rurikovich117]

Увы, но третье значение в кубическом уравнении Х = 0. Но Х≠0!!!!! Но, автор не должен был его потерять. У нас за это снижают оценку на экзамене.

[@franciscoborquezk.155]

You shouldn't have eliminated one x, for it is a cubic function, and therefore look for three (3) solutions. Even if the solution isn't applicable