4s^2+9s+5=0

Solution for 4s^2+9s+5=0 equation:

Simplifying
4s2 + 9s + 5 = 0

Reorder the terms:
5 + 9s + 4s2 = 0

Solving
5 + 9s + 4s2 = 0

Solving for variable 's'.

Factor a trinomial.
(5 + 4s)(1 + s) = 0

Subproblem 1
Set the factor '(5 + 4s)' equal to zero and attempt to solve:

Simplifying
5 + 4s = 0

Solving
5 + 4s = 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 + 4s = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 4s = 0 + -5
4s = 0 + -5

Combine like terms: 0 + -5 = -5
4s = -5

Divide each side by '4'.
s = -1.25

Simplifying
s = -1.25
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 = {-1.25, -1}