108=(3x)(x)

Solution for 108=(3x)(x) equation:

Simplifying
108 = (3x)(x)

Remove parenthesis around (3x)
108 = 3x(x)

Multiply x * x
108 = 3x2

Solving
108 = 3x2

Solving for variable 'x'.

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

Add '-3x2' to each side of the equation.
108 + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
108 + -3x2 = 0

Add '-108' to each side of the equation.
108 + -108 + -3x2 = 0 + -108

Combine like terms: 108 + -108 = 0
0 + -3x2 = 0 + -108
-3x2 = 0 + -108

Combine like terms: 0 + -108 = -108
-3x2 = -108

Divide each side by '-3'.
x2 = 36

Simplifying
x2 = 36

Take the square root of each side:
x = {-6, 6}