r^2-2=79

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Solution for r^2-2=79 equation: 


Simplifying
r2 + -2 = 79

Reorder the terms:
-2 + r2 = 79

Solving
-2 + r2 = 79

Solving for variable 'r'.

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

Add '2' to each side of the equation.
-2 + 2 + r2 = 79 + 2

Combine like terms: -2 + 2 = 0
0 + r2 = 79 + 2
r2 = 79 + 2

Combine like terms: 79 + 2 = 81
r2 = 81

Simplifying
r2 = 81

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

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