am nevoie urgent de ajutor ,dau coroana
![Am Nevoie Urgent De Ajutor Dau Coroana class=](https://ro-static.z-dn.net/files/d20/0e02ea219e5e30a89a2137ead5faf884.jpg)
[tex]\it E(x)=(2x-1)^2-(1-2x)^2+1=(2x-1)^2-(2x-1)^2+1=0+1=1[/tex]