1464.9984=4(3.14)r^2

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Solution for 1464.9984=4(3.14)r^2 equation: 


Simplifying
1464.9984 = 4(3.14) * r2

Multiply 4 * 3.14
1464.9984 = 12.56r2

Solving
1464.9984 = 12.56r2

Solving for variable 'r'.

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

Add '-12.56r2' to each side of the equation.
1464.9984 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
1464.9984 + -12.56r2 = 0.00

Add '-1464.9984' to each side of the equation.
1464.9984 + -1464.9984 + -12.56r2 = 0.00 + -1464.9984

Combine like terms: 1464.9984 + -1464.9984 = 0.0000
0.0000 + -12.56r2 = 0.00 + -1464.9984
-12.56r2 = 0.00 + -1464.9984

Combine like terms: 0.00 + -1464.9984 = -1464.9984
-12.56r2 = -1464.9984

Divide each side by '-12.56'.
r2 = 116.64

Simplifying
r2 = 116.64

Take the square root of each side:
r = {-10.8, 10.8}

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