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Rezolvati in multimea R ecuatia: radical din 3x+2=8

Răspuns :

[tex] \sqrt{3x} +2=8\\ \sqrt{3x} =6| ^{2} \\3x=36\\x=12 [/tex]
[tex] \sqrt{3x} +2=8=\ \textgreater \ \sqrt{3x} =8-2=\ \textgreater \ \sqrt{3x} =6=\ \textgreater \ |3x| \left \{ {{-6} \atop {6}} \right. =\ \textgreater \ 3x=-6[/tex]