0=x^2-14x+12

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Solution for 0=x^2-14x+12 equation:


Simplifying
0 = x2 + -14x + 12

Reorder the terms:
0 = 12 + -14x + x2

Solving
0 = 12 + -14x + x2

Solving for variable 'x'.

Combine like terms: 0 + -12 = -12
-12 + 14x + -1x2 = 12 + -14x + x2 + -12 + 14x + -1x2

Reorder the terms:
-12 + 14x + -1x2 = 12 + -12 + -14x + 14x + x2 + -1x2

Combine like terms: 12 + -12 = 0
-12 + 14x + -1x2 = 0 + -14x + 14x + x2 + -1x2
-12 + 14x + -1x2 = -14x + 14x + x2 + -1x2

Combine like terms: -14x + 14x = 0
-12 + 14x + -1x2 = 0 + x2 + -1x2
-12 + 14x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-12 + 14x + -1x2 = 0

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

Divide each side by '-1'.
12 + -14x + x2 = 0

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + -14x + -12 + x2 = 0 + -12

Reorder the terms:
12 + -12 + -14x + x2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -14x + x2 = 0 + -12
-14x + x2 = 0 + -12

Combine like terms: 0 + -12 = -12
-14x + x2 = -12

The x term is -14x.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14x + 49 + x2 = -12 + 49

Reorder the terms:
49 + -14x + x2 = -12 + 49

Combine like terms: -12 + 49 = 37
49 + -14x + x2 = 37

Factor a perfect square on the left side:
(x + -7)(x + -7) = 37

Calculate the square root of the right side: 6.08276253

Break this problem into two subproblems by setting 
(x + -7) equal to 6.08276253 and -6.08276253.

Subproblem 1

x + -7 = 6.08276253 Simplifying x + -7 = 6.08276253 Reorder the terms: -7 + x = 6.08276253 Solving -7 + x = 6.08276253 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 6.08276253 + 7 Combine like terms: -7 + 7 = 0 0 + x = 6.08276253 + 7 x = 6.08276253 + 7 Combine like terms: 6.08276253 + 7 = 13.08276253 x = 13.08276253 Simplifying x = 13.08276253

Subproblem 2

x + -7 = -6.08276253 Simplifying x + -7 = -6.08276253 Reorder the terms: -7 + x = -6.08276253 Solving -7 + x = -6.08276253 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = -6.08276253 + 7 Combine like terms: -7 + 7 = 0 0 + x = -6.08276253 + 7 x = -6.08276253 + 7 Combine like terms: -6.08276253 + 7 = 0.91723747 x = 0.91723747 Simplifying x = 0.91723747

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.08276253, 0.91723747}

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