0=26.3040625+-8.6335*x+0.5538148438*x^2

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Solution for 0=26.3040625+-8.6335*x+0.5538148438*x^2 equation:


Simplifying
0 = 26.3040625 + -8.6335x + 0.5538148438x2

Solving
0 = 26.3040625 + -8.6335x + 0.5538148438x2

Solving for variable 'x'.

Combine like terms: 0 + -26.3040625 = -26.3040625
-26.3040625 + 8.6335x + -0.5538148438x2 = 26.3040625 + -8.6335x + 0.5538148438x2 + -26.3040625 + 8.6335x + -0.5538148438x2

Reorder the terms:
-26.3040625 + 8.6335x + -0.5538148438x2 = 26.3040625 + -26.3040625 + -8.6335x + 8.6335x + 0.5538148438x2 + -0.5538148438x2

Combine like terms: 26.3040625 + -26.3040625 = 0.0000000
-26.3040625 + 8.6335x + -0.5538148438x2 = 0.0000000 + -8.6335x + 8.6335x + 0.5538148438x2 + -0.5538148438x2
-26.3040625 + 8.6335x + -0.5538148438x2 = -8.6335x + 8.6335x + 0.5538148438x2 + -0.5538148438x2

Combine like terms: -8.6335x + 8.6335x = 0.0000
-26.3040625 + 8.6335x + -0.5538148438x2 = 0.0000 + 0.5538148438x2 + -0.5538148438x2
-26.3040625 + 8.6335x + -0.5538148438x2 = 0.5538148438x2 + -0.5538148438x2

Combine like terms: 0.5538148438x2 + -0.5538148438x2 = 0.0000000000
-26.3040625 + 8.6335x + -0.5538148438x2 = 0.0000000000

Begin completing the square.  Divide all terms by
-0.5538148438 the coefficient of the squared term: 

Divide each side by '-0.5538148438'.
47.49613123 + -15.58914517x + x2 = 0

Move the constant term to the right:

Add '-47.49613123' to each side of the equation.
47.49613123 + -15.58914517x + -47.49613123 + x2 = 0 + -47.49613123

Reorder the terms:
47.49613123 + -47.49613123 + -15.58914517x + x2 = 0 + -47.49613123

Combine like terms: 47.49613123 + -47.49613123 = 0.00000000
0.00000000 + -15.58914517x + x2 = 0 + -47.49613123
-15.58914517x + x2 = 0 + -47.49613123

Combine like terms: 0 + -47.49613123 = -47.49613123
-15.58914517x + x2 = -47.49613123

The x term is -15.58914517x.  Take half its coefficient (-7.794572585).
Square it (60.75536178) and add it to both sides.

Add '60.75536178' to each side of the equation.
-15.58914517x + 60.75536178 + x2 = -47.49613123 + 60.75536178

Reorder the terms:
60.75536178 + -15.58914517x + x2 = -47.49613123 + 60.75536178

Combine like terms: -47.49613123 + 60.75536178 = 13.25923055
60.75536178 + -15.58914517x + x2 = 13.25923055

Factor a perfect square on the left side:
(x + -7.794572585)(x + -7.794572585) = 13.25923055

Calculate the square root of the right side: 3.641322637

Break this problem into two subproblems by setting 
(x + -7.794572585) equal to 3.641322637 and -3.641322637.

Subproblem 1

x + -7.794572585 = 3.641322637 Simplifying x + -7.794572585 = 3.641322637 Reorder the terms: -7.794572585 + x = 3.641322637 Solving -7.794572585 + x = 3.641322637 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.794572585' to each side of the equation. -7.794572585 + 7.794572585 + x = 3.641322637 + 7.794572585 Combine like terms: -7.794572585 + 7.794572585 = 0.000000000 0.000000000 + x = 3.641322637 + 7.794572585 x = 3.641322637 + 7.794572585 Combine like terms: 3.641322637 + 7.794572585 = 11.435895222 x = 11.435895222 Simplifying x = 11.435895222

Subproblem 2

x + -7.794572585 = -3.641322637 Simplifying x + -7.794572585 = -3.641322637 Reorder the terms: -7.794572585 + x = -3.641322637 Solving -7.794572585 + x = -3.641322637 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.794572585' to each side of the equation. -7.794572585 + 7.794572585 + x = -3.641322637 + 7.794572585 Combine like terms: -7.794572585 + 7.794572585 = 0.000000000 0.000000000 + x = -3.641322637 + 7.794572585 x = -3.641322637 + 7.794572585 Combine like terms: -3.641322637 + 7.794572585 = 4.153249948 x = 4.153249948 Simplifying x = 4.153249948

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.435895222, 4.153249948}

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