1436=4*3.14r^2

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Solution for 1436=4*3.14r^2 equation: 


Simplifying
1436 = 4 * 3.14r2

Multiply 4 * 3.14
1436 = 12.56r2

Solving
1436 = 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.
1436 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
1436 + -12.56r2 = 0.00

Add '-1436' to each side of the equation.
1436 + -1436 + -12.56r2 = 0.00 + -1436

Combine like terms: 1436 + -1436 = 0
0 + -12.56r2 = 0.00 + -1436
-12.56r2 = 0.00 + -1436

Combine like terms: 0.00 + -1436 = -1436
-12.56r2 = -1436

Divide each side by '-12.56'.
r2 = 114.3312102

Simplifying
r2 = 114.3312102

Take the square root of each side:
r = {-10.692577341, 10.692577341}

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