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Simplifying
530.66 = 3.14r2
Solving
530.66 = 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.
530.66 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
530.66 + -3.14r2 = 0.00
Add '-530.66' to each side of the equation.
530.66 + -530.66 + -3.14r2 = 0.00 + -530.66
Combine like terms: 530.66 + -530.66 = 0.00
0.00 + -3.14r2 = 0.00 + -530.66
-3.14r2 = 0.00 + -530.66
Combine like terms: 0.00 + -530.66 = -530.66
-3.14r2 = -530.66
Divide each side by '-3.14'.
r2 = 169
Simplifying
r2 = 169
Take the square root of each side:
r = {-13, 13}
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