Resposta :
Resposta:
3x²-27 = 0
3x² = 27
x² = 27
----
3
x = ±√9
x = ±3
s = {-3;3}
Oie, tudo bom?
Resposta: S = {- 3 ; 3}.
[tex]3x {}^{2} - 27 = 0 \\ x {}^{2} - 9 = 0 \\ x { }^{2} = 9 \\ x = ± \sqrt{9} \\ \boxed{x = ±3}[/tex]
[tex]\boxed{S = \left \{- 3 \: , \: 3\right \}}[/tex]
Att. NLE Top Shotta