Respuesta :

solution

[tex]\begin{gathered} 2x^2+8x-12=0 \\ x^2+4x-6=0 \\ x^2+4x=6 \\ x^2+4x+4=6+4 \\ x^2+4x+4=10 \\ (x+2)^2=10 \end{gathered}[/tex]