2.75x^2-36x+11=0

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Solution for 2.75x^2-36x+11=0 equation:


Simplifying
2.75x2 + -36x + 11 = 0

Reorder the terms:
11 + -36x + 2.75x2 = 0

Solving
11 + -36x + 2.75x2 = 0

Solving for variable 'x'.

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

Divide each side by '2.75'.
4 + -13.09090909x + x2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -13.09090909x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + -13.09090909x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -13.09090909x + x2 = 0 + -4
-13.09090909x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
-13.09090909x + x2 = -4

The x term is -13.09090909x.  Take half its coefficient (-6.545454545).
Square it (42.84297520) and add it to both sides.

Add '42.84297520' to each side of the equation.
-13.09090909x + 42.84297520 + x2 = -4 + 42.84297520

Reorder the terms:
42.84297520 + -13.09090909x + x2 = -4 + 42.84297520

Combine like terms: -4 + 42.84297520 = 38.8429752
42.84297520 + -13.09090909x + x2 = 38.8429752

Factor a perfect square on the left side:
(x + -6.545454545)(x + -6.545454545) = 38.8429752

Calculate the square root of the right side: 6.232413273

Break this problem into two subproblems by setting 
(x + -6.545454545) equal to 6.232413273 and -6.232413273.

Subproblem 1

x + -6.545454545 = 6.232413273 Simplifying x + -6.545454545 = 6.232413273 Reorder the terms: -6.545454545 + x = 6.232413273 Solving -6.545454545 + x = 6.232413273 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.545454545' to each side of the equation. -6.545454545 + 6.545454545 + x = 6.232413273 + 6.545454545 Combine like terms: -6.545454545 + 6.545454545 = 0.000000000 0.000000000 + x = 6.232413273 + 6.545454545 x = 6.232413273 + 6.545454545 Combine like terms: 6.232413273 + 6.545454545 = 12.777867818 x = 12.777867818 Simplifying x = 12.777867818

Subproblem 2

x + -6.545454545 = -6.232413273 Simplifying x + -6.545454545 = -6.232413273 Reorder the terms: -6.545454545 + x = -6.232413273 Solving -6.545454545 + x = -6.232413273 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.545454545' to each side of the equation. -6.545454545 + 6.545454545 + x = -6.232413273 + 6.545454545 Combine like terms: -6.545454545 + 6.545454545 = 0.000000000 0.000000000 + x = -6.232413273 + 6.545454545 x = -6.232413273 + 6.545454545 Combine like terms: -6.232413273 + 6.545454545 = 0.313041272 x = 0.313041272 Simplifying x = 0.313041272

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.777867818, 0.313041272}

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