20-5(s*s)=0

Solution for 20-5(s*s)=0 equation:

Simplifying
20 + -5(s * s) = 0

Multiply s * s
20 + -5(s2) = 0

Solving
20 + -5s2 = 0

Solving for variable 's'.

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

Add '-20' to each side of the equation.
20 + -20 + -5s2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -5s2 = 0 + -20
-5s2 = 0 + -20

Combine like terms: 0 + -20 = -20
-5s2 = -20

Divide each side by '-5'.
s2 = 4

Simplifying
s2 = 4

Take the square root of each side:
s = {-2, 2}