9s^2+9s-4=0

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

Simplifying
9s2 + 9s + -4 = 0

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

Solving
-4 + 9s + 9s2 = 0

Solving for variable 's'.

Factor a trinomial.
(-4 + -3s)(1 + -3s) = 0

Subproblem 1
Set the factor '(-4 + -3s)' equal to zero and attempt to solve:

Simplifying
-4 + -3s = 0

Solving
-4 + -3s = 0

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

Add '4' to each side of the equation.
-4 + 4 + -3s = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -3s = 0 + 4
-3s = 0 + 4

Combine like terms: 0 + 4 = 4
-3s = 4

Divide each side by '-3'.
s = -1.333333333

Simplifying
s = -1.333333333
Subproblem 2
Set the factor '(1 + -3s)' equal to zero and attempt to solve:

Simplifying
1 + -3s = 0

Solving
1 + -3s = 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 + -3s = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -3s = 0 + -1
-3s = 0 + -1

Combine like terms: 0 + -1 = -1
-3s = -1

Divide each side by '-3'.
s = 0.3333333333

Simplifying
s = 0.3333333333
Solution
s = {-1.333333333, 0.3333333333}