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Rezolvati ecuatia: 49x²=121

Răspuns :

Miky93
[tex]49x^2=121 \\\\ x^2=\frac{121}{49} \\\\\sqrt{x^2}=\sqrt{\frac{121}{49}} \\\\ |x|=\frac{11}{7} \\\\ \boxed{x \in \{ \pm \frac{11}{7} \}}[/tex]

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