Am atasat o poza, Succes ! =)
Salut!
[tex] - {x}^{2} + 6 \times x - 9 = 0 \\ {x}^{2} - 6 \times x + 9 = 0 \\ (x - 3)^{2} = 0 \\ x - 3 = 0 \\ x = 0 + 3 \\ x = 3[/tex]
