Question

Solve for x: 2x^2 - 18 = 0

please give detailed steps!!

Answer 1

Answer:

$x = 3$

or

$x = - 3$

Step-by-step explanation:

Set up equation

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

Add 18 on both sides

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

Divide both sides by 2.

${x}^{2} = 9$

Take the square root of 9

Remeber square root solutions produce positive and negative Solutions.

$x = 3$

$x = - 3$