[tex] \sqrt{2 \times - 1 = 3} [/tex]


Răspuns :

[tex] \sqrt{2 x- 1} = 3 \\ 2x - 1 = 9 \\ 2x = 9 + 1 \\ 2x = 10 \\ x = \frac{10}{2} \\ x = 5[/tex]