64=r^2

Solution for 64=r^2 equation:

Simplifying
64 = r2

Solving
64 = 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.
64 + -1r2 = r2 + -1r2

Combine like terms: r2 + -1r2 = 0
64 + -1r2 = 0

Add '-64' to each side of the equation.
64 + -64 + -1r2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -1r2 = 0 + -64
-1r2 = 0 + -64

Combine like terms: 0 + -64 = -64
-1r2 = -64

Divide each side by '-1'.
r2 = 64

Simplifying
r2 = 64

Take the square root of each side:
r = {-8, 8}