Resposta :
Olá
[tex]\mathtt{2x^2-14=0}\\\\\mathtt{2x^2=0+14}\\\\\mathtt{2x^2=14}\\\\\mathtt{\frac{2x^2}{2}=\frac{14}{2}}\\\\\mathtt{x^2=7}\\\\\huge\orange{\boxed{\mathtt{x'=\sqrt{7},\:x''=-\sqrt{7}}}}[/tex]
Espero ter ajudado!
Resposta:
X' = + \/7
X" = - \/7
Explicação passo-a-passo:
2 x^2 - 14 = 0
2x^2 = 14
X^2 = 14/2
X^2 = 7
X = +/- \/7
R.:
X' = + \/7
X" = - \/7