216c^2-294r^2=0

Solution for 216c^2-294r^2=0 equation:

Simplifying
216c2 + -294r2 = 0

Solving
216c2 + -294r2 = 0

Solving for variable 'c'.

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

Add '294r2' to each side of the equation.
216c2 + -294r2 + 294r2 = 0 + 294r2

Combine like terms: -294r2 + 294r2 = 0
216c2 + 0 = 0 + 294r2
216c2 = 0 + 294r2
Remove the zero:
216c2 = 294r2

Divide each side by '216'.
c2 = 1.361111111r2

Simplifying
c2 = 1.361111111r2

Take the square root of each side:
c = {-1.166666667r, 1.166666667r}