-(s^2-4s-5)=0

Solution for -(s^2-4s-5)=0 equation:

Simplifying
-1(s2 + -4s + -5) = 0

Reorder the terms:
-1(-5 + -4s + s2) = 0
(-5 * -1 + -4s * -1 + s2 * -1) = 0
(5 + 4s + -1s2) = 0

Solving
5 + 4s + -1s2 = 0

Solving for variable 's'.

Factor a trinomial.
(5 + -1s)(1 + s) = 0

Subproblem 1
Set the factor '(5 + -1s)' equal to zero and attempt to solve:

Simplifying
5 + -1s = 0

Solving
5 + -1s = 0

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

Add '-5' to each side of the equation.
5 + -5 + -1s = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -1s = 0 + -5
-1s = 0 + -5

Combine like terms: 0 + -5 = -5
-1s = -5

Divide each side by '-1'.
s = 5

Simplifying
s = 5
Subproblem 2
Set the factor '(1 + s)' equal to zero and attempt to solve:

Simplifying
1 + s = 0

Solving
1 + s = 0

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

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

Combine like terms: 1 + -1 = 0
0 + s = 0 + -1
s = 0 + -1

Combine like terms: 0 + -1 = -1
s = -1

Simplifying
s = -1
Solution
s = {5, -1}