omba3d diri lmomayiz delta bach tal9ay 7al lmo3adala 4x²-12x+9=0 tal9ay delt yossawi sifr ay x1=x2=-b/2a w ta7lilha howa a(x-x1)² tal9ay ta7lil 4(x-3/2)² w p(x)= 4(x-3/2)²(x+2) haka normalement