0=x^2-14x-16

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Solution for 0=x^2-14x-16 equation:


Simplifying
0 = x2 + -14x + -16

Reorder the terms:
0 = -16 + -14x + x2

Solving
0 = -16 + -14x + x2

Solving for variable 'x'.

Combine like terms: 0 + 16 = 16
16 + 14x + -1x2 = -16 + -14x + x2 + 16 + 14x + -1x2

Reorder the terms:
16 + 14x + -1x2 = -16 + 16 + -14x + 14x + x2 + -1x2

Combine like terms: -16 + 16 = 0
16 + 14x + -1x2 = 0 + -14x + 14x + x2 + -1x2
16 + 14x + -1x2 = -14x + 14x + x2 + -1x2

Combine like terms: -14x + 14x = 0
16 + 14x + -1x2 = 0 + x2 + -1x2
16 + 14x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
16 + 14x + -1x2 = 0

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

Divide each side by '-1'.
-16 + -14x + x2 = 0

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + -14x + 16 + x2 = 0 + 16

Reorder the terms:
-16 + 16 + -14x + x2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + -14x + x2 = 0 + 16
-14x + x2 = 0 + 16

Combine like terms: 0 + 16 = 16
-14x + x2 = 16

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 = 16 + 49

Reorder the terms:
49 + -14x + x2 = 16 + 49

Combine like terms: 16 + 49 = 65
49 + -14x + x2 = 65

Factor a perfect square on the left side:
(x + -7)(x + -7) = 65

Calculate the square root of the right side: 8.062257748

Break this problem into two subproblems by setting 
(x + -7) equal to 8.062257748 and -8.062257748.

Subproblem 1

x + -7 = 8.062257748 Simplifying x + -7 = 8.062257748 Reorder the terms: -7 + x = 8.062257748 Solving -7 + x = 8.062257748 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 = 8.062257748 + 7 Combine like terms: -7 + 7 = 0 0 + x = 8.062257748 + 7 x = 8.062257748 + 7 Combine like terms: 8.062257748 + 7 = 15.062257748 x = 15.062257748 Simplifying x = 15.062257748

Subproblem 2

x + -7 = -8.062257748 Simplifying x + -7 = -8.062257748 Reorder the terms: -7 + x = -8.062257748 Solving -7 + x = -8.062257748 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 = -8.062257748 + 7 Combine like terms: -7 + 7 = 0 0 + x = -8.062257748 + 7 x = -8.062257748 + 7 Combine like terms: -8.062257748 + 7 = -1.062257748 x = -1.062257748 Simplifying x = -1.062257748

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.062257748, -1.062257748}

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