6358.5=(3.14)*r^2

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Solution for 6358.5=(3.14)*r^2 equation: 


Simplifying
6358.5 = (3.14) * r2

Solving
6358.5 = 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.
6358.5 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
6358.5 + -3.14r2 = 0.00

Add '-6358.5' to each side of the equation.
6358.5 + -6358.5 + -3.14r2 = 0.00 + -6358.5

Combine like terms: 6358.5 + -6358.5 = 0.0
0.0 + -3.14r2 = 0.00 + -6358.5
-3.14r2 = 0.00 + -6358.5

Combine like terms: 0.00 + -6358.5 = -6358.5
-3.14r2 = -6358.5

Divide each side by '-3.14'.
r2 = 2025

Simplifying
r2 = 2025

Take the square root of each side:
r = {-45, 45}

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