Verified answer

C)

[tex]\Large\mathsf\displaystyle{} {6x}^{2} = 24 \\\Large\mathsf\displaystyle{} {x}^{2} = 4 \\\Large\mathsf\displaystyle{}x = \pm \sqrt{4} \\\Large\mathsf\displaystyle{}x = \pm2 \\\\ \Large\mathsf\displaystyle{}x = - 2 \\ \Large\mathsf\displaystyle{}x = 2[/tex]

Solução:

[tex]\Large\displaystyle\text{$\begin{gathered} \underline{\boxed{\boldsymbol{ x_{1} = - 2 }}}\end{gathered}$} [/tex]

[tex]\Large\displaystyle\text{$\begin{gathered} \underline{\boxed{\boldsymbol{ x_{2} = 2 }}}\end{gathered}$} [/tex]

D)

[tex]\Large\mathsf\displaystyle{} {7x}^{2} - 14 = 0 \\ \Large\mathsf\displaystyle{} {x}^{2} - 2 = 0 \\\Large\mathsf\displaystyle{} {x}^{2} = 2 \\ \Large\mathsf\displaystyle{}x = \pm \sqrt{2} \\ \Large\mathsf\displaystyle{}x = - \sqrt{2} \\ \Large\mathsf\displaystyle{} x = \sqrt{2} [/tex]

Solução:

[tex]\Large\displaystyle\text{$\begin{gathered} \underline{\boxed{\boldsymbol{ x_{1} = - \sqrt{2} }}}\end{gathered}$} [/tex]

[tex]\Large\displaystyle\text{$\begin{gathered} \underline{\boxed{\boldsymbol{ x_{2} = \sqrt{2} }}}\end{gathered}$} [/tex]

[tex]\displaystyle\text{$\begin{gathered} \underline{\boxed{\boldsymbol{{ \red{Bons}} \blue{\:Estudos}}}}\end{gathered}$} [/tex]