22.77=r^2

Solution for 22.77=r^2 equation:

Simplifying
22.77 = r2

Solving
22.77 = 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.
22.77 + -1r2 = r2 + -1r2

Combine like terms: r2 + -1r2 = 0
22.77 + -1r2 = 0

Add '-22.77' to each side of the equation.
22.77 + -22.77 + -1r2 = 0 + -22.77

Combine like terms: 22.77 + -22.77 = 0.00
0.00 + -1r2 = 0 + -22.77
-1r2 = 0 + -22.77

Combine like terms: 0 + -22.77 = -22.77
-1r2 = -22.77

Divide each side by '-1'.
r2 = 22.77

Simplifying
r2 = 22.77

Take the square root of each side:
r = {-4.771792116, 4.771792116}