r^2-144=0

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Solution for r^2-144=0 equation: 


Simplifying
r2 + -144 = 0

Reorder the terms:
-144 + r2 = 0

Solving
-144 + r2 = 0

Solving for variable 'r'.

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

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

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

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

Simplifying
r2 = 144

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

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