a) (4x-2)(4x+1)+(x-5)²=21
b) (2x+1)² -3x(x-5)-1=0
c) (x-3)(x²-2x+4)=x(x-2)(x+5
•Poftim poza cu nr.(a) CA EXEMPLU :))
![A 4x24x1x521b 2x1 3xx510c X3x2x4xx2x5Poftim Poza Cu Nra CA EXEMPLU class=](https://ro-static.z-dn.net/files/d8b/17b87e5dcd020b106d0fc8a96203fba7.jpg)