2r^2-162=

Solution for 2r^2-162= equation:

Simplifying
2r2 + -162 = 0

Reorder the terms:
-162 + 2r2 = 0

Solving
-162 + 2r2 = 0

Solving for variable 'r'.

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

Add '162' to each side of the equation.
-162 + 162 + 2r2 = 0 + 162

Combine like terms: -162 + 162 = 0
0 + 2r2 = 0 + 162
2r2 = 0 + 162

Combine like terms: 0 + 162 = 162
2r2 = 162

Divide each side by '2'.
r2 = 81

Simplifying
r2 = 81

Take the square root of each side:
r = {-9, 9}