Question

$2X^{2} - 18 = 0$

Answer 1

Explicación paso a paso:

$2x ^{2} - 18 = 0$

$2x {}^{2} = 18$

$x {}^{2} = \frac{18}{2}$

$x {}^{2} = 9$

$x = \sqrt{9}$

$x = 3$

Espero que te sirva:)