5s(s-11)=4

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Solution for 5s(s-11)=4 equation:


Simplifying
5s(s + -11) = 4

Reorder the terms:
5s(-11 + s) = 4
(-11 * 5s + s * 5s) = 4
(-55s + 5s2) = 4

Solving
-55s + 5s2 = 4

Solving for variable 's'.

Reorder the terms:
-4 + -55s + 5s2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -55s + 5s2 = 0

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

Divide each side by '5'.
-0.8 + -11s + s2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + -11s + 0.8 + s2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + -11s + s2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + -11s + s2 = 0 + 0.8
-11s + s2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
-11s + s2 = 0.8

The s term is -11s.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11s + 30.25 + s2 = 0.8 + 30.25

Reorder the terms:
30.25 + -11s + s2 = 0.8 + 30.25

Combine like terms: 0.8 + 30.25 = 31.05
30.25 + -11s + s2 = 31.05

Factor a perfect square on the left side:
(s + -5.5)(s + -5.5) = 31.05

Calculate the square root of the right side: 5.572252686

Break this problem into two subproblems by setting 
(s + -5.5) equal to 5.572252686 and -5.572252686.

Subproblem 1

s + -5.5 = 5.572252686 Simplifying s + -5.5 = 5.572252686 Reorder the terms: -5.5 + s = 5.572252686 Solving -5.5 + s = 5.572252686 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + s = 5.572252686 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + s = 5.572252686 + 5.5 s = 5.572252686 + 5.5 Combine like terms: 5.572252686 + 5.5 = 11.072252686 s = 11.072252686 Simplifying s = 11.072252686

Subproblem 2

s + -5.5 = -5.572252686 Simplifying s + -5.5 = -5.572252686 Reorder the terms: -5.5 + s = -5.572252686 Solving -5.5 + s = -5.572252686 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + s = -5.572252686 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + s = -5.572252686 + 5.5 s = -5.572252686 + 5.5 Combine like terms: -5.572252686 + 5.5 = -0.072252686 s = -0.072252686 Simplifying s = -0.072252686

Solution

The solution to the problem is based on the solutions from the subproblems. s = {11.072252686, -0.072252686}

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