225=s*s

Solution for 225=s*s equation:

Simplifying
225 = s * s

Multiply s * s
225 = s2

Solving
225 = s2

Solving for variable 's'.

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

Add '-1s2' to each side of the equation.
225 + -1s2 = s2 + -1s2

Combine like terms: s2 + -1s2 = 0
225 + -1s2 = 0

Add '-225' to each side of the equation.
225 + -225 + -1s2 = 0 + -225

Combine like terms: 225 + -225 = 0
0 + -1s2 = 0 + -225
-1s2 = 0 + -225

Combine like terms: 0 + -225 = -225
-1s2 = -225

Divide each side by '-1'.
s2 = 225

Simplifying
s2 = 225

Take the square root of each side:
s = {-15, 15}