4r^2-108=0

Solution for 4r^2-108=0 equation:

Simplifying
4r2 + -108 = 0

Reorder the terms:
-108 + 4r2 = 0

Solving
-108 + 4r2 = 0

Solving for variable 'r'.

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

Add '108' to each side of the equation.
-108 + 108 + 4r2 = 0 + 108

Combine like terms: -108 + 108 = 0
0 + 4r2 = 0 + 108
4r2 = 0 + 108

Combine like terms: 0 + 108 = 108
4r2 = 108

Divide each side by '4'.
r2 = 27

Simplifying
r2 = 27

Take the square root of each side:
r = {-5.196152423, 5.196152423}