s=12-0.25s^2

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Solution for s=12-0.25s^2 equation:


Simplifying
s = 12 + -0.25s2

Solving
s = 12 + -0.25s2

Solving for variable 's'.

Reorder the terms:
-12 + s + 0.25s2 = 12 + -0.25s2 + -12 + 0.25s2

Reorder the terms:
-12 + s + 0.25s2 = 12 + -12 + -0.25s2 + 0.25s2

Combine like terms: 12 + -12 = 0
-12 + s + 0.25s2 = 0 + -0.25s2 + 0.25s2
-12 + s + 0.25s2 = -0.25s2 + 0.25s2

Combine like terms: -0.25s2 + 0.25s2 = 0.00
-12 + s + 0.25s2 = 0.00

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

Divide each side by '0.25'.
-48 + 4s + s2 = 0

Move the constant term to the right:

Add '48' to each side of the equation.
-48 + 4s + 48 + s2 = 0 + 48

Reorder the terms:
-48 + 48 + 4s + s2 = 0 + 48

Combine like terms: -48 + 48 = 0
0 + 4s + s2 = 0 + 48
4s + s2 = 0 + 48

Combine like terms: 0 + 48 = 48
4s + s2 = 48

The s term is s.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
4s + 0.25 + s2 = 48 + 0.25

Reorder the terms:
0.25 + 4s + s2 = 48 + 0.25

Combine like terms: 48 + 0.25 = 48.25
0.25 + 4s + s2 = 48.25

Factor a perfect square on the left side:
(s + 0.5)(s + 0.5) = 48.25

Calculate the square root of the right side: 6.946221995

Break this problem into two subproblems by setting 
(s + 0.5) equal to 6.946221995 and -6.946221995.

Subproblem 1

s + 0.5 = 6.946221995 Simplifying s + 0.5 = 6.946221995 Reorder the terms: 0.5 + s = 6.946221995 Solving 0.5 + s = 6.946221995 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + s = 6.946221995 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + s = 6.946221995 + -0.5 s = 6.946221995 + -0.5 Combine like terms: 6.946221995 + -0.5 = 6.446221995 s = 6.446221995 Simplifying s = 6.446221995

Subproblem 2

s + 0.5 = -6.946221995 Simplifying s + 0.5 = -6.946221995 Reorder the terms: 0.5 + s = -6.946221995 Solving 0.5 + s = -6.946221995 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + s = -6.946221995 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + s = -6.946221995 + -0.5 s = -6.946221995 + -0.5 Combine like terms: -6.946221995 + -0.5 = -7.446221995 s = -7.446221995 Simplifying s = -7.446221995

Solution

The solution to the problem is based on the solutions from the subproblems. s = {6.446221995, -7.446221995}

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