-9=-8s^2

Solution for -9=-8s^2 equation:

Simplifying
-9 = -8s2

Solving
-9 = -8s2

Solving for variable 's'.

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

Add '8s2' to each side of the equation.
-9 + 8s2 = -8s2 + 8s2

Combine like terms: -8s2 + 8s2 = 0
-9 + 8s2 = 0

Add '9' to each side of the equation.
-9 + 9 + 8s2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 8s2 = 0 + 9
8s2 = 0 + 9

Combine like terms: 0 + 9 = 9
8s2 = 9

Divide each side by '8'.
s2 = 1.125

Simplifying
s2 = 1.125

Take the square root of each side:
s = {-1.060660172, 1.060660172}