0=x^2-11x+22

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Solution for 0=x^2-11x+22 equation:


Simplifying
0 = x2 + -11x + 22

Reorder the terms:
0 = 22 + -11x + x2

Solving
0 = 22 + -11x + x2

Solving for variable 'x'.

Combine like terms: 0 + -22 = -22
-22 + 11x + -1x2 = 22 + -11x + x2 + -22 + 11x + -1x2

Reorder the terms:
-22 + 11x + -1x2 = 22 + -22 + -11x + 11x + x2 + -1x2

Combine like terms: 22 + -22 = 0
-22 + 11x + -1x2 = 0 + -11x + 11x + x2 + -1x2
-22 + 11x + -1x2 = -11x + 11x + x2 + -1x2

Combine like terms: -11x + 11x = 0
-22 + 11x + -1x2 = 0 + x2 + -1x2
-22 + 11x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-22 + 11x + -1x2 = 0

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

Divide each side by '-1'.
22 + -11x + x2 = 0

Move the constant term to the right:

Add '-22' to each side of the equation.
22 + -11x + -22 + x2 = 0 + -22

Reorder the terms:
22 + -22 + -11x + x2 = 0 + -22

Combine like terms: 22 + -22 = 0
0 + -11x + x2 = 0 + -22
-11x + x2 = 0 + -22

Combine like terms: 0 + -22 = -22
-11x + x2 = -22

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 = -22 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -22 + 30.25

Combine like terms: -22 + 30.25 = 8.25
30.25 + -11x + x2 = 8.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 8.25

Calculate the square root of the right side: 2.872281323

Break this problem into two subproblems by setting 
(x + -5.5) equal to 2.872281323 and -2.872281323.

Subproblem 1

x + -5.5 = 2.872281323 Simplifying x + -5.5 = 2.872281323 Reorder the terms: -5.5 + x = 2.872281323 Solving -5.5 + x = 2.872281323 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 = 2.872281323 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 2.872281323 + 5.5 x = 2.872281323 + 5.5 Combine like terms: 2.872281323 + 5.5 = 8.372281323 x = 8.372281323 Simplifying x = 8.372281323

Subproblem 2

x + -5.5 = -2.872281323 Simplifying x + -5.5 = -2.872281323 Reorder the terms: -5.5 + x = -2.872281323 Solving -5.5 + x = -2.872281323 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 = -2.872281323 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -2.872281323 + 5.5 x = -2.872281323 + 5.5 Combine like terms: -2.872281323 + 5.5 = 2.627718677 x = 2.627718677 Simplifying x = 2.627718677

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.372281323, 2.627718677}

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