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Simplifying
69.08 = 3.14r2
Solving
69.08 = 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.
69.08 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
69.08 + -3.14r2 = 0.00
Add '-69.08' to each side of the equation.
69.08 + -69.08 + -3.14r2 = 0.00 + -69.08
Combine like terms: 69.08 + -69.08 = 0.00
0.00 + -3.14r2 = 0.00 + -69.08
-3.14r2 = 0.00 + -69.08
Combine like terms: 0.00 + -69.08 = -69.08
-3.14r2 = -69.08
Divide each side by '-3.14'.
r2 = 22
Simplifying
r2 = 22
Take the square root of each side:
r = {-4.69041576, 4.69041576}
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