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Simplifying
8 = 3.14r2
Solving
8 = 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.
8 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
8 + -3.14r2 = 0.00
Add '-8' to each side of the equation.
8 + -8 + -3.14r2 = 0.00 + -8
Combine like terms: 8 + -8 = 0
0 + -3.14r2 = 0.00 + -8
-3.14r2 = 0.00 + -8
Combine like terms: 0.00 + -8 = -8
-3.14r2 = -8
Divide each side by '-3.14'.
r2 = 2.547770701
Simplifying
r2 = 2.547770701
Take the square root of each side:
r = {-1.596173769, 1.596173769}
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