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Simplifying
75.36 = 3.14r2
Solving
75.36 = 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.
75.36 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
75.36 + -3.14r2 = 0.00
Add '-75.36' to each side of the equation.
75.36 + -75.36 + -3.14r2 = 0.00 + -75.36
Combine like terms: 75.36 + -75.36 = 0.00
0.00 + -3.14r2 = 0.00 + -75.36
-3.14r2 = 0.00 + -75.36
Combine like terms: 0.00 + -75.36 = -75.36
-3.14r2 = -75.36
Divide each side by '-3.14'.
r2 = 24
Simplifying
r2 = 24
Take the square root of each side:
r = {-4.898979486, 4.898979486}
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