Question

2x+12x+18=0
$2x$
2 x ao quadrado + 12x + 18 = 0 ​

Answer 1

Resposta:

$x_{1} =-3-\sqrt{6}\\x_{2} =-3+\sqrt{6}$

Explicação passo-a-passo:

$2x^{2} +12x+18=0\\x^{2} +6x+3=0\\\Delta=\sqrt{(6^{2}-4*1*3)}=\sqrt{(36-12)}=\sqrt{24} =2\sqrt{6} \\x_{12} =\frac{-6\pm2\sqrt{6} }{2} =-3\pm\sqrt{6}$