823.69=r^2

Solution for 823.69=r^2 equation:

Simplifying
823.69 = r2

Solving
823.69 = 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.
823.69 + -1r2 = r2 + -1r2

Combine like terms: r2 + -1r2 = 0
823.69 + -1r2 = 0

Add '-823.69' to each side of the equation.
823.69 + -823.69 + -1r2 = 0 + -823.69

Combine like terms: 823.69 + -823.69 = 0.00
0.00 + -1r2 = 0 + -823.69
-1r2 = 0 + -823.69

Combine like terms: 0 + -823.69 = -823.69
-1r2 = -823.69

Divide each side by '-1'.
r2 = 823.69

Simplifying
r2 = 823.69

Take the square root of each side:
r = {-28.7, 28.7}