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Simplifying
379.84 = 3.14r2
Solving
379.84 = 3.14r2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-3.14r2' to each side of the equation.
379.84 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
379.84 + -3.14r2 = 0.00
Add '-379.84' to each side of the equation.
379.84 + -379.84 + -3.14r2 = 0.00 + -379.84
Combine like terms: 379.84 + -379.84 = 0.00
0.00 + -3.14r2 = 0.00 + -379.84
-3.14r2 = 0.00 + -379.84
Combine like terms: 0.00 + -379.84 = -379.84
-3.14r2 = -379.84
Divide each side by '-3.14'.
r2 = 120.9681529
Simplifying
r2 = 120.9681529
Take the square root of each side:
r = {-10.998552309, 10.998552309}
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