9r^2=-9

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Solution for 9r^2=-9 equation: 


Simplifying
9r2 = -9

Solving
9r2 = -9

Solving for variable 'r'.

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

Divide each side by '9'.
r2 = -1

Simplifying
r2 = -1

Reorder the terms:
1 + r2 = -1 + 1

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

The solution to this equation could not be determined.

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