Răspuns: [tex]\boxed{\bf x_{1}= \sqrt{6}~~ ~~si~ ~~~ x_{2}=- \sqrt{6}}[/tex]
Explicație:
[tex]\bf 3x^2-5=13[/tex]
[tex]\bf 3x^2=13+5[/tex]
[tex]\bf 3x^2=18~~~~~\bigg|:3[/tex]
[tex]\bf x^2=6\implies x=\pm \sqrt{6}[/tex]
[tex]\boxed{\bf x_{1}= \sqrt{6}~~ ~~si~ ~~~ x_{2}=- \sqrt{6}}[/tex]
