2x^2+11=10x

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Solution for 2x^2+11=10x equation:


Simplifying
2x2 + 11 = 10x

Reorder the terms:
11 + 2x2 = 10x

Solving
11 + 2x2 = 10x

Solving for variable 'x'.

Reorder the terms:
11 + -10x + 2x2 = 10x + -10x

Combine like terms: 10x + -10x = 0
11 + -10x + 2x2 = 0

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

Divide each side by '2'.
5.5 + -5x + x2 = 0

Move the constant term to the right:

Add '-5.5' to each side of the equation.
5.5 + -5x + -5.5 + x2 = 0 + -5.5

Reorder the terms:
5.5 + -5.5 + -5x + x2 = 0 + -5.5

Combine like terms: 5.5 + -5.5 = 0.0
0.0 + -5x + x2 = 0 + -5.5
-5x + x2 = 0 + -5.5

Combine like terms: 0 + -5.5 = -5.5
-5x + x2 = -5.5

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -5.5 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -5.5 + 6.25

Combine like terms: -5.5 + 6.25 = 0.75
6.25 + -5x + x2 = 0.75

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 0.75

Calculate the square root of the right side: 0.866025404

Break this problem into two subproblems by setting 
(x + -2.5) equal to 0.866025404 and -0.866025404.

Subproblem 1

x + -2.5 = 0.866025404 Simplifying x + -2.5 = 0.866025404 Reorder the terms: -2.5 + x = 0.866025404 Solving -2.5 + x = 0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 0.866025404 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 0.866025404 + 2.5 x = 0.866025404 + 2.5 Combine like terms: 0.866025404 + 2.5 = 3.366025404 x = 3.366025404 Simplifying x = 3.366025404

Subproblem 2

x + -2.5 = -0.866025404 Simplifying x + -2.5 = -0.866025404 Reorder the terms: -2.5 + x = -0.866025404 Solving -2.5 + x = -0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -0.866025404 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -0.866025404 + 2.5 x = -0.866025404 + 2.5 Combine like terms: -0.866025404 + 2.5 = 1.633974596 x = 1.633974596 Simplifying x = 1.633974596

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.366025404, 1.633974596}

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