84.9056=3.14r^2

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Solution for 84.9056=3.14r^2 equation: 


Simplifying
84.9056 = 3.14r2

Solving
84.9056 = 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.
84.9056 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
84.9056 + -3.14r2 = 0.00

Add '-84.9056' to each side of the equation.
84.9056 + -84.9056 + -3.14r2 = 0.00 + -84.9056

Combine like terms: 84.9056 + -84.9056 = 0.0000
0.0000 + -3.14r2 = 0.00 + -84.9056
-3.14r2 = 0.00 + -84.9056

Combine like terms: 0.00 + -84.9056 = -84.9056
-3.14r2 = -84.9056

Divide each side by '-3.14'.
r2 = 27.04

Simplifying
r2 = 27.04

Take the square root of each side:
r = {-5.2, 5.2}

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