0=x^2-11x+27

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Solution for 0=x^2-11x+27 equation:


Simplifying
0 = x2 + -11x + 27

Reorder the terms:
0 = 27 + -11x + x2

Solving
0 = 27 + -11x + x2

Solving for variable 'x'.

Combine like terms: 0 + -27 = -27
-27 + 11x + -1x2 = 27 + -11x + x2 + -27 + 11x + -1x2

Reorder the terms:
-27 + 11x + -1x2 = 27 + -27 + -11x + 11x + x2 + -1x2

Combine like terms: 27 + -27 = 0
-27 + 11x + -1x2 = 0 + -11x + 11x + x2 + -1x2
-27 + 11x + -1x2 = -11x + 11x + x2 + -1x2

Combine like terms: -11x + 11x = 0
-27 + 11x + -1x2 = 0 + x2 + -1x2
-27 + 11x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-27 + 11x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
27 + -11x + x2 = 0

Move the constant term to the right:

Add '-27' to each side of the equation.
27 + -11x + -27 + x2 = 0 + -27

Reorder the terms:
27 + -27 + -11x + x2 = 0 + -27

Combine like terms: 27 + -27 = 0
0 + -11x + x2 = 0 + -27
-11x + x2 = 0 + -27

Combine like terms: 0 + -27 = -27
-11x + x2 = -27

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = -27 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -27 + 30.25

Combine like terms: -27 + 30.25 = 3.25
30.25 + -11x + x2 = 3.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(x + -5.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

x + -5.5 = 1.802775638 Simplifying x + -5.5 = 1.802775638 Reorder the terms: -5.5 + x = 1.802775638 Solving -5.5 + x = 1.802775638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 1.802775638 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 1.802775638 + 5.5 x = 1.802775638 + 5.5 Combine like terms: 1.802775638 + 5.5 = 7.302775638 x = 7.302775638 Simplifying x = 7.302775638

Subproblem 2

x + -5.5 = -1.802775638 Simplifying x + -5.5 = -1.802775638 Reorder the terms: -5.5 + x = -1.802775638 Solving -5.5 + x = -1.802775638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -1.802775638 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -1.802775638 + 5.5 x = -1.802775638 + 5.5 Combine like terms: -1.802775638 + 5.5 = 3.697224362 x = 3.697224362 Simplifying x = 3.697224362

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.302775638, 3.697224362}

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