9 x^{2}-81=0

2 x^{2}=200

 x^{2}-2=0

 x^{2}-121=0

 x^{2}=16

4 x^{2}=100

 x^{2}=16"/>

9 x^{2}-81=0

2 x^{2}=200

 x^{2}-2=0

 x^{2}-121=0

 x^{2}=16

4 x^{2}=100

 x^{2}=16 ✪ Resposta Rápida ✔"/>

9 x^{2}-81=0

2 x^{2}=200

 x^{2}-2=0

 x^{2}-121=0

 x^{2}=16

4 x^{2}=100

 x^{2}=16"/>