2r^2-131=0

Solution for 2r^2-131=0 equation:

Simplifying
2r2 + -131 = 0

Reorder the terms:
-131 + 2r2 = 0

Solving
-131 + 2r2 = 0

Solving for variable 'r'.

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

Add '131' to each side of the equation.
-131 + 131 + 2r2 = 0 + 131

Combine like terms: -131 + 131 = 0
0 + 2r2 = 0 + 131
2r2 = 0 + 131

Combine like terms: 0 + 131 = 131
2r2 = 131

Divide each side by '2'.
r2 = 65.5

Simplifying
r2 = 65.5

Take the square root of each side:
r = {-8.093207028, 8.093207028}