7641504=3.14*r^2

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Solution for 7641504=3.14*r^2 equation: 


Simplifying
7641504 = 3.14r2

Solving
7641504 = 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.
7641504 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
7641504 + -3.14r2 = 0.00

Add '-7641504' to each side of the equation.
7641504 + -7641504 + -3.14r2 = 0.00 + -7641504

Combine like terms: 7641504 + -7641504 = 0
0 + -3.14r2 = 0.00 + -7641504
-3.14r2 = 0.00 + -7641504

Combine like terms: 0.00 + -7641504 = -7641504
-3.14r2 = -7641504

Divide each side by '-3.14'.
r2 = 2433600

Simplifying
r2 = 2433600

Take the square root of each side:
r = {-1560, 1560}

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