0=x^2-22x+12

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Solution for 0=x^2-22x+12 equation:


Simplifying
0 = x2 + -22x + 12

Reorder the terms:
0 = 12 + -22x + x2

Solving
0 = 12 + -22x + x2

Solving for variable 'x'.

Combine like terms: 0 + -12 = -12
-12 + 22x + -1x2 = 12 + -22x + x2 + -12 + 22x + -1x2

Reorder the terms:
-12 + 22x + -1x2 = 12 + -12 + -22x + 22x + x2 + -1x2

Combine like terms: 12 + -12 = 0
-12 + 22x + -1x2 = 0 + -22x + 22x + x2 + -1x2
-12 + 22x + -1x2 = -22x + 22x + x2 + -1x2

Combine like terms: -22x + 22x = 0
-12 + 22x + -1x2 = 0 + x2 + -1x2
-12 + 22x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-12 + 22x + -1x2 = 0

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

Divide each side by '-1'.
12 + -22x + x2 = 0

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + -22x + -12 + x2 = 0 + -12

Reorder the terms:
12 + -12 + -22x + x2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -22x + x2 = 0 + -12
-22x + x2 = 0 + -12

Combine like terms: 0 + -12 = -12
-22x + x2 = -12

The x term is -22x.  Take half its coefficient (-11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
-22x + 121 + x2 = -12 + 121

Reorder the terms:
121 + -22x + x2 = -12 + 121

Combine like terms: -12 + 121 = 109
121 + -22x + x2 = 109

Factor a perfect square on the left side:
(x + -11)(x + -11) = 109

Calculate the square root of the right side: 10.440306509

Break this problem into two subproblems by setting 
(x + -11) equal to 10.440306509 and -10.440306509.

Subproblem 1

x + -11 = 10.440306509 Simplifying x + -11 = 10.440306509 Reorder the terms: -11 + x = 10.440306509 Solving -11 + x = 10.440306509 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = 10.440306509 + 11 Combine like terms: -11 + 11 = 0 0 + x = 10.440306509 + 11 x = 10.440306509 + 11 Combine like terms: 10.440306509 + 11 = 21.440306509 x = 21.440306509 Simplifying x = 21.440306509

Subproblem 2

x + -11 = -10.440306509 Simplifying x + -11 = -10.440306509 Reorder the terms: -11 + x = -10.440306509 Solving -11 + x = -10.440306509 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = -10.440306509 + 11 Combine like terms: -11 + 11 = 0 0 + x = -10.440306509 + 11 x = -10.440306509 + 11 Combine like terms: -10.440306509 + 11 = 0.559693491 x = 0.559693491 Simplifying x = 0.559693491

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.440306509, 0.559693491}

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