9x^2-55x+11=0

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Solution for 9x^2-55x+11=0 equation:


Simplifying
9x2 + -55x + 11 = 0

Reorder the terms:
11 + -55x + 9x2 = 0

Solving
11 + -55x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
1.222222222 + -6.111111111x + x2 = 0

Move the constant term to the right:

Add '-1.222222222' to each side of the equation.
1.222222222 + -6.111111111x + -1.222222222 + x2 = 0 + -1.222222222

Reorder the terms:
1.222222222 + -1.222222222 + -6.111111111x + x2 = 0 + -1.222222222

Combine like terms: 1.222222222 + -1.222222222 = 0.000000000
0.000000000 + -6.111111111x + x2 = 0 + -1.222222222
-6.111111111x + x2 = 0 + -1.222222222

Combine like terms: 0 + -1.222222222 = -1.222222222
-6.111111111x + x2 = -1.222222222

The x term is -6.111111111x.  Take half its coefficient (-3.055555556).
Square it (9.336419756) and add it to both sides.

Add '9.336419756' to each side of the equation.
-6.111111111x + 9.336419756 + x2 = -1.222222222 + 9.336419756

Reorder the terms:
9.336419756 + -6.111111111x + x2 = -1.222222222 + 9.336419756

Combine like terms: -1.222222222 + 9.336419756 = 8.114197534
9.336419756 + -6.111111111x + x2 = 8.114197534

Factor a perfect square on the left side:
(x + -3.055555556)(x + -3.055555556) = 8.114197534

Calculate the square root of the right side: 2.848543055

Break this problem into two subproblems by setting 
(x + -3.055555556) equal to 2.848543055 and -2.848543055.

Subproblem 1

x + -3.055555556 = 2.848543055 Simplifying x + -3.055555556 = 2.848543055 Reorder the terms: -3.055555556 + x = 2.848543055 Solving -3.055555556 + x = 2.848543055 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.055555556' to each side of the equation. -3.055555556 + 3.055555556 + x = 2.848543055 + 3.055555556 Combine like terms: -3.055555556 + 3.055555556 = 0.000000000 0.000000000 + x = 2.848543055 + 3.055555556 x = 2.848543055 + 3.055555556 Combine like terms: 2.848543055 + 3.055555556 = 5.904098611 x = 5.904098611 Simplifying x = 5.904098611

Subproblem 2

x + -3.055555556 = -2.848543055 Simplifying x + -3.055555556 = -2.848543055 Reorder the terms: -3.055555556 + x = -2.848543055 Solving -3.055555556 + x = -2.848543055 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.055555556' to each side of the equation. -3.055555556 + 3.055555556 + x = -2.848543055 + 3.055555556 Combine like terms: -3.055555556 + 3.055555556 = 0.000000000 0.000000000 + x = -2.848543055 + 3.055555556 x = -2.848543055 + 3.055555556 Combine like terms: -2.848543055 + 3.055555556 = 0.207012501 x = 0.207012501 Simplifying x = 0.207012501

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.904098611, 0.207012501}

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