0=r^2-104.04

Solution for 0=r^2-104.04 equation:

Simplifying
0 = r2 + -104.04

Reorder the terms:
0 = -104.04 + r2

Solving
0 = -104.04 + r2

Solving for variable 'r'.

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

Add '-1r2' to each side of the equation.
0 + -1r2 = -104.04 + r2 + -1r2
Remove the zero:
-1r2 = -104.04 + r2 + -1r2

Combine like terms: r2 + -1r2 = 0
-1r2 = -104.04 + 0
-1r2 = -104.04

Divide each side by '-1'.
r2 = 104.04

Simplifying
r2 = 104.04

Take the square root of each side:
r = {-10.2, 10.2}