144=r^2

Solution for 144=r^2 equation:

Simplifying
144 = r2

Solving
144 = r2

Solving for variable 'r'.

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

Add '-1r2' to each side of the equation.
144 + -1r2 = r2 + -1r2

Combine like terms: r2 + -1r2 = 0
144 + -1r2 = 0

Add '-144' to each side of the equation.
144 + -144 + -1r2 = 0 + -144

Combine like terms: 144 + -144 = 0
0 + -1r2 = 0 + -144
-1r2 = 0 + -144

Combine like terms: 0 + -144 = -144
-1r2 = -144

Divide each side by '-1'.
r2 = 144

Simplifying
r2 = 144

Take the square root of each side:
r = {-12, 12}