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Daca |x| = 2supra3 atunci x={...}


Răspuns :

[tex]x \in \{{- \frac{2}{3} ; \frac{2}{3}\}[/tex]
[tex]|x|= \frac{2}{3} \\ x= \frac{2}{3} \\ x=- \frac{2}{3} [/tex]
[tex]x[/tex] ∈ [tex] \left \{ - \frac{2}{3} ; \frac{2}{3} \left \}[/tex]