6x^2+8=-55x

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Solution for 6x^2+8=-55x equation:


Simplifying
6x2 + 8 = -55x

Reorder the terms:
8 + 6x2 = -55x

Solving
8 + 6x2 = -55x

Solving for variable 'x'.

Reorder the terms:
8 + 55x + 6x2 = -55x + 55x

Combine like terms: -55x + 55x = 0
8 + 55x + 6x2 = 0

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

Divide each side by '6'.
1.333333333 + 9.166666667x + x2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + 9.166666667x + -1.333333333 + x2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + 9.166666667x + x2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + 9.166666667x + x2 = 0 + -1.333333333
9.166666667x + x2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
9.166666667x + x2 = -1.333333333

The x term is 9.166666667x.  Take half its coefficient (4.583333334).
Square it (21.00694445) and add it to both sides.

Add '21.00694445' to each side of the equation.
9.166666667x + 21.00694445 + x2 = -1.333333333 + 21.00694445

Reorder the terms:
21.00694445 + 9.166666667x + x2 = -1.333333333 + 21.00694445

Combine like terms: -1.333333333 + 21.00694445 = 19.673611117
21.00694445 + 9.166666667x + x2 = 19.673611117

Factor a perfect square on the left side:
(x + 4.583333334)(x + 4.583333334) = 19.673611117

Calculate the square root of the right side: 4.435494461

Break this problem into two subproblems by setting 
(x + 4.583333334) equal to 4.435494461 and -4.435494461.

Subproblem 1

x + 4.583333334 = 4.435494461 Simplifying x + 4.583333334 = 4.435494461 Reorder the terms: 4.583333334 + x = 4.435494461 Solving 4.583333334 + x = 4.435494461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.583333334' to each side of the equation. 4.583333334 + -4.583333334 + x = 4.435494461 + -4.583333334 Combine like terms: 4.583333334 + -4.583333334 = 0.000000000 0.000000000 + x = 4.435494461 + -4.583333334 x = 4.435494461 + -4.583333334 Combine like terms: 4.435494461 + -4.583333334 = -0.147838873 x = -0.147838873 Simplifying x = -0.147838873

Subproblem 2

x + 4.583333334 = -4.435494461 Simplifying x + 4.583333334 = -4.435494461 Reorder the terms: 4.583333334 + x = -4.435494461 Solving 4.583333334 + x = -4.435494461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.583333334' to each side of the equation. 4.583333334 + -4.583333334 + x = -4.435494461 + -4.583333334 Combine like terms: 4.583333334 + -4.583333334 = 0.000000000 0.000000000 + x = -4.435494461 + -4.583333334 x = -4.435494461 + -4.583333334 Combine like terms: -4.435494461 + -4.583333334 = -9.018827795 x = -9.018827795 Simplifying x = -9.018827795

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.147838873, -9.018827795}

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