25r^2-625=0

Solution for 25r^2-625=0 equation:

Simplifying
25r2 + -625 = 0

Reorder the terms:
-625 + 25r2 = 0

Solving
-625 + 25r2 = 0

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '625' to each side of the equation.
-625 + 625 + 25r2 = 0 + 625

Combine like terms: -625 + 625 = 0
0 + 25r2 = 0 + 625
25r2 = 0 + 625

Combine like terms: 0 + 625 = 625
25r2 = 625

Divide each side by '25'.
r2 = 25

Simplifying
r2 = 25

Take the square root of each side:
r = {-5, 5}