3846.5=3.15*r^2

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Solution for 3846.5=3.15*r^2 equation: 


Simplifying
3846.5 = 3.15r2

Solving
3846.5 = 3.15r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-3.15r2' to each side of the equation.
3846.5 + -3.15r2 = 3.15r2 + -3.15r2

Combine like terms: 3.15r2 + -3.15r2 = 0.00
3846.5 + -3.15r2 = 0.00

Add '-3846.5' to each side of the equation.
3846.5 + -3846.5 + -3.15r2 = 0.00 + -3846.5

Combine like terms: 3846.5 + -3846.5 = 0.0
0.0 + -3.15r2 = 0.00 + -3846.5
-3.15r2 = 0.00 + -3846.5

Combine like terms: 0.00 + -3846.5 = -3846.5
-3.15r2 = -3846.5

Divide each side by '-3.15'.
r2 = 1221.111111

Simplifying
r2 = 1221.111111

Take the square root of each side:
r = {-34.944400281, 34.944400281}

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