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Simplifying
1332 = 3.14r2 * 9
Reorder the terms for easier multiplication:
1332 = 3.14 * 9r2
Multiply 3.14 * 9
1332 = 28.26r2
Solving
1332 = 28.26r2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-28.26r2' to each side of the equation.
1332 + -28.26r2 = 28.26r2 + -28.26r2
Combine like terms: 28.26r2 + -28.26r2 = 0.00
1332 + -28.26r2 = 0.00
Add '-1332' to each side of the equation.
1332 + -1332 + -28.26r2 = 0.00 + -1332
Combine like terms: 1332 + -1332 = 0
0 + -28.26r2 = 0.00 + -1332
-28.26r2 = 0.00 + -1332
Combine like terms: 0.00 + -1332 = -1332
-28.26r2 = -1332
Divide each side by '-28.26'.
r2 = 47.13375796
Simplifying
r2 = 47.13375796
Take the square root of each side:
r = {-6.865402971, 6.865402971}
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