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Simplifying
22.8906 = 3.14r2
Solving
22.8906 = 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.
22.8906 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
22.8906 + -3.14r2 = 0.00
Add '-22.8906' to each side of the equation.
22.8906 + -22.8906 + -3.14r2 = 0.00 + -22.8906
Combine like terms: 22.8906 + -22.8906 = 0.0000
0.0000 + -3.14r2 = 0.00 + -22.8906
-3.14r2 = 0.00 + -22.8906
Combine like terms: 0.00 + -22.8906 = -22.8906
-3.14r2 = -22.8906
Divide each side by '-3.14'.
r2 = 7.29
Simplifying
r2 = 7.29
Take the square root of each side:
r = {-2.7, 2.7}
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