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Simplifying
12r2 = 45 + 512
Combine like terms: 45 + 512 = 557
12r2 = 557
Solving
12r2 = 557
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Divide each side by '12'.
r2 = 46.41666667
Simplifying
r2 = 46.41666667
Take the square root of each side:
r = {-6.812977812, 6.812977812}
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