0=x^2-14x-14

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


Simplifying
0 = x2 + -14x + -14

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

Solving
0 = -14 + -14x + x2

Solving for variable 'x'.

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

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

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

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

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

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

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

Move the constant term to the right:

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

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

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

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

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 = 14 + 49

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

Combine like terms: 14 + 49 = 63
49 + -14x + x2 = 63

Factor a perfect square on the left side:
(x + -7)(x + -7) = 63

Calculate the square root of the right side: 7.937253933

Break this problem into two subproblems by setting 
(x + -7) equal to 7.937253933 and -7.937253933.

Subproblem 1

x + -7 = 7.937253933 Simplifying x + -7 = 7.937253933 Reorder the terms: -7 + x = 7.937253933 Solving -7 + x = 7.937253933 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 = 7.937253933 + 7 Combine like terms: -7 + 7 = 0 0 + x = 7.937253933 + 7 x = 7.937253933 + 7 Combine like terms: 7.937253933 + 7 = 14.937253933 x = 14.937253933 Simplifying x = 14.937253933

Subproblem 2

x + -7 = -7.937253933 Simplifying x + -7 = -7.937253933 Reorder the terms: -7 + x = -7.937253933 Solving -7 + x = -7.937253933 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 = -7.937253933 + 7 Combine like terms: -7 + 7 = 0 0 + x = -7.937253933 + 7 x = -7.937253933 + 7 Combine like terms: -7.937253933 + 7 = -0.937253933 x = -0.937253933 Simplifying x = -0.937253933

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.937253933, -0.937253933}

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