-11.8=5q(-2-8q)-8.8q

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Solution for -11.8=5q(-2-8q)-8.8q equation:


Simplifying
-11.8 = 5q(-2 + -8q) + -8.8q
-11.8 = (-2 * 5q + -8q * 5q) + -8.8q
-11.8 = (-10q + -40q2) + -8.8q

Reorder the terms:
-11.8 = -10q + -8.8q + -40q2

Combine like terms: -10q + -8.8q = -18.8q
-11.8 = -18.8q + -40q2

Solving
-11.8 = -18.8q + -40q2

Solving for variable 'q'.

Reorder the terms:
-11.8 + 18.8q + 40q2 = -18.8q + 18.8q + -40q2 + 40q2

Combine like terms: -18.8q + 18.8q = 0.0
-11.8 + 18.8q + 40q2 = 0.0 + -40q2 + 40q2
-11.8 + 18.8q + 40q2 = -40q2 + 40q2

Combine like terms: -40q2 + 40q2 = 0
-11.8 + 18.8q + 40q2 = 0

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

Divide each side by '40'.
-0.295 + 0.47q + q2 = 0

Move the constant term to the right:

Add '0.295' to each side of the equation.
-0.295 + 0.47q + 0.295 + q2 = 0 + 0.295

Reorder the terms:
-0.295 + 0.295 + 0.47q + q2 = 0 + 0.295

Combine like terms: -0.295 + 0.295 = 0.000
0.000 + 0.47q + q2 = 0 + 0.295
0.47q + q2 = 0 + 0.295

Combine like terms: 0 + 0.295 = 0.295
0.47q + q2 = 0.295

The q term is 0.47q.  Take half its coefficient (0.235).
Square it (0.055225) and add it to both sides.

Add '0.055225' to each side of the equation.
0.47q + 0.055225 + q2 = 0.295 + 0.055225

Reorder the terms:
0.055225 + 0.47q + q2 = 0.295 + 0.055225

Combine like terms: 0.295 + 0.055225 = 0.350225
0.055225 + 0.47q + q2 = 0.350225

Factor a perfect square on the left side:
(q + 0.235)(q + 0.235) = 0.350225

Calculate the square root of the right side: 0.591798107

Break this problem into two subproblems by setting 
(q + 0.235) equal to 0.591798107 and -0.591798107.

Subproblem 1

q + 0.235 = 0.591798107 Simplifying q + 0.235 = 0.591798107 Reorder the terms: 0.235 + q = 0.591798107 Solving 0.235 + q = 0.591798107 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-0.235' to each side of the equation. 0.235 + -0.235 + q = 0.591798107 + -0.235 Combine like terms: 0.235 + -0.235 = 0.000 0.000 + q = 0.591798107 + -0.235 q = 0.591798107 + -0.235 Combine like terms: 0.591798107 + -0.235 = 0.356798107 q = 0.356798107 Simplifying q = 0.356798107

Subproblem 2

q + 0.235 = -0.591798107 Simplifying q + 0.235 = -0.591798107 Reorder the terms: 0.235 + q = -0.591798107 Solving 0.235 + q = -0.591798107 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-0.235' to each side of the equation. 0.235 + -0.235 + q = -0.591798107 + -0.235 Combine like terms: 0.235 + -0.235 = 0.000 0.000 + q = -0.591798107 + -0.235 q = -0.591798107 + -0.235 Combine like terms: -0.591798107 + -0.235 = -0.826798107 q = -0.826798107 Simplifying q = -0.826798107

Solution

The solution to the problem is based on the solutions from the subproblems. q = {0.356798107, -0.826798107}

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