2r^2-30=0

Solution for 2r^2-30=0 equation:

Simplifying
2r2 + -30 = 0

Reorder the terms:
-30 + 2r2 = 0

Solving
-30 + 2r2 = 0

Solving for variable 'r'.

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

Add '30' to each side of the equation.
-30 + 30 + 2r2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + 2r2 = 0 + 30
2r2 = 0 + 30

Combine like terms: 0 + 30 = 30
2r2 = 30

Divide each side by '2'.
r2 = 15

Simplifying
r2 = 15

Take the square root of each side:
r = {-3.872983346, 3.872983346}