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Simplifying
276.32 = 3.14r2
Solving
276.32 = 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.
276.32 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
276.32 + -3.14r2 = 0.00
Add '-276.32' to each side of the equation.
276.32 + -276.32 + -3.14r2 = 0.00 + -276.32
Combine like terms: 276.32 + -276.32 = 0.00
0.00 + -3.14r2 = 0.00 + -276.32
-3.14r2 = 0.00 + -276.32
Combine like terms: 0.00 + -276.32 = -276.32
-3.14r2 = -276.32
Divide each side by '-3.14'.
r2 = 88
Simplifying
r2 = 88
Take the square root of each side:
r = {-9.38083152, 9.38083152}
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