Ajutor!!!!!!!!!.....
![Ajutor class=](https://ro-static.z-dn.net/files/d89/9058c85c6585d91a7a3d82c9bac86d35.jpg)
x•(x+4)•(x+4)-5
3x•8-5
3x•3
x=1
Verificare:1•5•5-5=20