(s+2)2s+4=43.2

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Solution for (s+2)2s+4=43.2 equation:


Simplifying
(s + 2) * 2s + 4 = 43.2

Reorder the terms:
(2 + s) * 2s + 4 = 43.2

Reorder the terms for easier multiplication:
2s(2 + s) + 4 = 43.2
(2 * 2s + s * 2s) + 4 = 43.2
(4s + 2s2) + 4 = 43.2

Reorder the terms:
4 + 4s + 2s2 = 43.2

Solving
4 + 4s + 2s2 = 43.2

Solving for variable 's'.

Reorder the terms:
4 + -43.2 + 4s + 2s2 = 43.2 + -43.2

Combine like terms: 4 + -43.2 = -39.2
-39.2 + 4s + 2s2 = 43.2 + -43.2

Combine like terms: 43.2 + -43.2 = 0.0
-39.2 + 4s + 2s2 = 0.0

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

Divide each side by '2'.
-19.6 + 2s + s2 = 0.0

Move the constant term to the right:

Add '19.6' to each side of the equation.
-19.6 + 2s + 19.6 + s2 = 0.0 + 19.6

Reorder the terms:
-19.6 + 19.6 + 2s + s2 = 0.0 + 19.6

Combine like terms: -19.6 + 19.6 = 0.0
0.0 + 2s + s2 = 0.0 + 19.6
2s + s2 = 0.0 + 19.6

Combine like terms: 0.0 + 19.6 = 19.6
2s + s2 = 19.6

The s term is 2s.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2s + 1 + s2 = 19.6 + 1

Reorder the terms:
1 + 2s + s2 = 19.6 + 1

Combine like terms: 19.6 + 1 = 20.6
1 + 2s + s2 = 20.6

Factor a perfect square on the left side:
(s + 1)(s + 1) = 20.6

Calculate the square root of the right side: 4.538722287

Break this problem into two subproblems by setting 
(s + 1) equal to 4.538722287 and -4.538722287.

Subproblem 1

s + 1 = 4.538722287 Simplifying s + 1 = 4.538722287 Reorder the terms: 1 + s = 4.538722287 Solving 1 + s = 4.538722287 Solving for variable 's'. 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 = 4.538722287 + -1 Combine like terms: 1 + -1 = 0 0 + s = 4.538722287 + -1 s = 4.538722287 + -1 Combine like terms: 4.538722287 + -1 = 3.538722287 s = 3.538722287 Simplifying s = 3.538722287

Subproblem 2

s + 1 = -4.538722287 Simplifying s + 1 = -4.538722287 Reorder the terms: 1 + s = -4.538722287 Solving 1 + s = -4.538722287 Solving for variable 's'. 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 = -4.538722287 + -1 Combine like terms: 1 + -1 = 0 0 + s = -4.538722287 + -1 s = -4.538722287 + -1 Combine like terms: -4.538722287 + -1 = -5.538722287 s = -5.538722287 Simplifying s = -5.538722287

Solution

The solution to the problem is based on the solutions from the subproblems. s = {3.538722287, -5.538722287}

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