18(x^2-4)=0

Solution for 18(x^2-4)=0 equation:

Simplifying
18(x2 + -4) = 0

Reorder the terms:
18(-4 + x2) = 0
(-4 * 18 + x2 * 18) = 0
(-72 + 18x2) = 0

Solving
-72 + 18x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '72' to each side of the equation.
-72 + 72 + 18x2 = 0 + 72

Combine like terms: -72 + 72 = 0
0 + 18x2 = 0 + 72
18x2 = 0 + 72

Combine like terms: 0 + 72 = 72
18x2 = 72

Divide each side by '18'.
x2 = 4

Simplifying
x2 = 4

Take the square root of each side:
x = {-2, 2}