-2r^2=12

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Solution for -2r^2=12 equation: 


Simplifying
-2r2 = 12

Solving
-2r2 = 12

Solving for variable 'r'.

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

Divide each side by '-2'.
r2 = -6

Simplifying
r2 = -6

Reorder the terms:
6 + r2 = -6 + 6

Combine like terms: -6 + 6 = 0
6 + r2 = 0

The solution to this equation could not be determined.

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