400=s^2

Solution for 400=s^2 equation:

Simplifying
400 = s2

Solving
400 = 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.
400 + -1s2 = s2 + -1s2

Combine like terms: s2 + -1s2 = 0
400 + -1s2 = 0

Add '-400' to each side of the equation.
400 + -400 + -1s2 = 0 + -400

Combine like terms: 400 + -400 = 0
0 + -1s2 = 0 + -400
-1s2 = 0 + -400

Combine like terms: 0 + -400 = -400
-1s2 = -400

Divide each side by '-1'.
s2 = 400

Simplifying
s2 = 400

Take the square root of each side:
s = {-20, 20}