Question

2x al cuadrado menos 18 = 0​

Answer 1

Respuesta:

$x_{1} =3\\\\x_{2} =-3$

Explicación paso a paso:

$2x^{2} -18=0\\\\2x^{2} =18\\\\x^{2} =\frac{18}{2} \\\\x^{2} =9\\\\x=\pm\sqrt{9} \\\\x=\pm3$