3.142(R^2-r^2)=0

Solution for 3.142(R^2-r^2)=0 equation:

Simplifying
3.142(R2 + -1r2) = 0
(R2 * 3.142 + -1r2 * 3.142) = 0
(3.142R2 + -3.142r2) = 0

Solving
3.142R2 + -3.142r2 = 0

Solving for variable 'R'.

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

Add '3.142r2' to each side of the equation.
3.142R2 + -3.142r2 + 3.142r2 = 0 + 3.142r2

Combine like terms: -3.142r2 + 3.142r2 = 0.000
3.142R2 + 0.000 = 0 + 3.142r2
3.142R2 = 0 + 3.142r2
Remove the zero:
3.142R2 = 3.142r2

Divide each side by '3.142'.
R2 = r2

Simplifying
R2 = r2

Take the square root of each side:
R = {-1r, r}