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Simplifying
326.6836 = 4 * 3.14r2
Multiply 4 * 3.14
326.6836 = 12.56r2
Solving
326.6836 = 12.56r2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-12.56r2' to each side of the equation.
326.6836 + -12.56r2 = 12.56r2 + -12.56r2
Combine like terms: 12.56r2 + -12.56r2 = 0.00
326.6836 + -12.56r2 = 0.00
Add '-326.6836' to each side of the equation.
326.6836 + -326.6836 + -12.56r2 = 0.00 + -326.6836
Combine like terms: 326.6836 + -326.6836 = 0.0000
0.0000 + -12.56r2 = 0.00 + -326.6836
-12.56r2 = 0.00 + -326.6836
Combine like terms: 0.00 + -326.6836 = -326.6836
-12.56r2 = -326.6836
Divide each side by '-12.56'.
r2 = 26.00984076
Simplifying
r2 = 26.00984076
Take the square root of each side:
r = {-5.099984388, 5.099984388}
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