r^2=-81

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Solution for r^2=-81 equation: 


Simplifying
r2 = -81

Solving
r2 = -81

Solving for variable 'r'.

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

Simplifying
r2 = -81

Reorder the terms:
81 + r2 = -81 + 81

Combine like terms: -81 + 81 = 0
81 + r2 = 0

The solution to this equation could not be determined.

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