3.14*r^2=25

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Solution for 3.14*r^2=25 equation: 


Simplifying
3.14r2 = 25

Solving
3.14r2 = 25

Solving for variable 'r'.

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

Divide each side by '3.14'.
r2 = 7.961783439

Simplifying
r2 = 7.961783439

Take the square root of each side:
r = {-2.82166324, 2.82166324}

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