57.76=r^2

Solution for 57.76=r^2 equation:

Simplifying
57.76 = r2

Solving
57.76 = 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.
57.76 + -1r2 = r2 + -1r2

Combine like terms: r2 + -1r2 = 0
57.76 + -1r2 = 0

Add '-57.76' to each side of the equation.
57.76 + -57.76 + -1r2 = 0 + -57.76

Combine like terms: 57.76 + -57.76 = 0.00
0.00 + -1r2 = 0 + -57.76
-1r2 = 0 + -57.76

Combine like terms: 0 + -57.76 = -57.76
-1r2 = -57.76

Divide each side by '-1'.
r2 = 57.76

Simplifying
r2 = 57.76

Take the square root of each side:
r = {-7.6, 7.6}