80=r^2

Solution for 80=r^2 equation:

Simplifying
80 = r2

Solving
80 = 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.
80 + -1r2 = r2 + -1r2

Combine like terms: r2 + -1r2 = 0
80 + -1r2 = 0

Add '-80' to each side of the equation.
80 + -80 + -1r2 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -1r2 = 0 + -80
-1r2 = 0 + -80

Combine like terms: 0 + -80 = -80
-1r2 = -80

Divide each side by '-1'.
r2 = 80

Simplifying
r2 = 80

Take the square root of each side:
r = {-8.94427191, 8.94427191}