-x^2+14x-14=0

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


Simplifying
-1x2 + 14x + -14 = 0

Reorder the terms:
-14 + 14x + -1x2 = 0

Solving
-14 + 14x + -1x2 = 0

Solving for variable 'x'.

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 = 35
49 + -14x + x2 = 35

Factor a perfect square on the left side:
(x + -7)(x + -7) = 35

Calculate the square root of the right side: 5.916079783

Break this problem into two subproblems by setting 
(x + -7) equal to 5.916079783 and -5.916079783.

Subproblem 1

x + -7 = 5.916079783 Simplifying x + -7 = 5.916079783 Reorder the terms: -7 + x = 5.916079783 Solving -7 + x = 5.916079783 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 = 5.916079783 + 7 Combine like terms: -7 + 7 = 0 0 + x = 5.916079783 + 7 x = 5.916079783 + 7 Combine like terms: 5.916079783 + 7 = 12.916079783 x = 12.916079783 Simplifying x = 12.916079783

Subproblem 2

x + -7 = -5.916079783 Simplifying x + -7 = -5.916079783 Reorder the terms: -7 + x = -5.916079783 Solving -7 + x = -5.916079783 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 = -5.916079783 + 7 Combine like terms: -7 + 7 = 0 0 + x = -5.916079783 + 7 x = -5.916079783 + 7 Combine like terms: -5.916079783 + 7 = 1.083920217 x = 1.083920217 Simplifying x = 1.083920217

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.916079783, 1.083920217}

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