-3.8s^2+0.9s-1.8-3(9s^2+6.3s-3)=

Solution for -3.8s^2+0.9s-1.8-3(9s^2+6.3s-3)= equation:

Simplifying
-3.8s2 + 0.9s + -1.8 + -3(9s2 + 6.3s + -3) = 0

Reorder the terms:
-3.8s2 + 0.9s + -1.8 + -3(-3 + 6.3s + 9s2) = 0
-3.8s2 + 0.9s + -1.8 + (-3 * -3 + 6.3s * -3 + 9s2 * -3) = 0
-3.8s2 + 0.9s + -1.8 + (9 + -18.9s + -27s2) = 0

Reorder the terms:
-1.8 + 9 + 0.9s + -18.9s + -3.8s2 + -27s2 = 0

Combine like terms: -1.8 + 9 = 7.2
7.2 + 0.9s + -18.9s + -3.8s2 + -27s2 = 0

Combine like terms: 0.9s + -18.9s = -18s
7.2 + -18s + -3.8s2 + -27s2 = 0

Combine like terms: -3.8s2 + -27s2 = -30.8s2
7.2 + -18s + -30.8s2 = 0

Solving
7.2 + -18s + -30.8s2 = 0

Solving for variable 's'.

Begin completing the square.  Divide all terms by
-30.8 the coefficient of the squared term: 

Divide each side by '-30.8'.
-0.2337662338 + 0.5844155844s + s2 = 0

Move the constant term to the right:

Add '0.2337662338' to each side of the equation.
-0.2337662338 + 0.5844155844s + 0.2337662338 + s2 = 0 + 0.2337662338

Reorder the terms:
-0.2337662338 + 0.2337662338 + 0.5844155844s + s2 = 0 + 0.2337662338

Combine like terms: -0.2337662338 + 0.2337662338 = 0.0000000000
0.0000000000 + 0.5844155844s + s2 = 0 + 0.2337662338
0.5844155844s + s2 = 0 + 0.2337662338

Combine like terms: 0 + 0.2337662338 = 0.2337662338
0.5844155844s + s2 = 0.2337662338

The s term is 0.5844155844s.  Take half its coefficient (0.2922077922).
Square it (0.08538539382) and add it to both sides.

Add '0.08538539382' to each side of the equation.
0.5844155844s + 0.08538539382 + s2 = 0.2337662338 + 0.08538539382

Reorder the terms:
0.08538539382 + 0.5844155844s + s2 = 0.2337662338 + 0.08538539382

Combine like terms: 0.2337662338 + 0.08538539382 = 0.31915162762
0.08538539382 + 0.5844155844s + s2 = 0.31915162762

Factor a perfect square on the left side:
(s + 0.2922077922)(s + 0.2922077922) = 0.31915162762

Calculate the square root of the right side: 0.564935065

Break this problem into two subproblems by setting 
(s + 0.2922077922) equal to 0.564935065 and -0.564935065.

Subproblem 1
s + 0.2922077922 = 0.564935065

Simplifying
s + 0.2922077922 = 0.564935065

Reorder the terms:
0.2922077922 + s = 0.564935065

Solving
0.2922077922 + s = 0.564935065

Solving for variable 's'.

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

Add '-0.2922077922' to each side of the equation.
0.2922077922 + -0.2922077922 + s = 0.564935065 + -0.2922077922

Combine like terms: 0.2922077922 + -0.2922077922 = 0.0000000000
0.0000000000 + s = 0.564935065 + -0.2922077922
s = 0.564935065 + -0.2922077922

Combine like terms: 0.564935065 + -0.2922077922 = 0.2727272728
s = 0.2727272728

Simplifying
s = 0.2727272728

Subproblem 2
s + 0.2922077922 = -0.564935065

Simplifying
s + 0.2922077922 = -0.564935065

Reorder the terms:
0.2922077922 + s = -0.564935065

Solving
0.2922077922 + s = -0.564935065

Solving for variable 's'.

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

Add '-0.2922077922' to each side of the equation.
0.2922077922 + -0.2922077922 + s = -0.564935065 + -0.2922077922

Combine like terms: 0.2922077922 + -0.2922077922 = 0.0000000000
0.0000000000 + s = -0.564935065 + -0.2922077922
s = -0.564935065 + -0.2922077922

Combine like terms: -0.564935065 + -0.2922077922 = -0.8571428572
s = -0.8571428572

Simplifying
s = -0.8571428572

Solution
The solution to the problem is based on the solutions
from the subproblems.
s = {0.2727272728, -0.8571428572}