x^2-14x-127=0

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Solution for x^2-14x-127=0 equation:


Simplifying
x2 + -14x + -127 = 0

Reorder the terms:
-127 + -14x + x2 = 0

Solving
-127 + -14x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '127' to each side of the equation.
-127 + -14x + 127 + x2 = 0 + 127

Reorder the terms:
-127 + 127 + -14x + x2 = 0 + 127

Combine like terms: -127 + 127 = 0
0 + -14x + x2 = 0 + 127
-14x + x2 = 0 + 127

Combine like terms: 0 + 127 = 127
-14x + x2 = 127

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 = 127 + 49

Reorder the terms:
49 + -14x + x2 = 127 + 49

Combine like terms: 127 + 49 = 176
49 + -14x + x2 = 176

Factor a perfect square on the left side:
(x + -7)(x + -7) = 176

Calculate the square root of the right side: 13.266499161

Break this problem into two subproblems by setting 
(x + -7) equal to 13.266499161 and -13.266499161.

Subproblem 1

x + -7 = 13.266499161 Simplifying x + -7 = 13.266499161 Reorder the terms: -7 + x = 13.266499161 Solving -7 + x = 13.266499161 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 = 13.266499161 + 7 Combine like terms: -7 + 7 = 0 0 + x = 13.266499161 + 7 x = 13.266499161 + 7 Combine like terms: 13.266499161 + 7 = 20.266499161 x = 20.266499161 Simplifying x = 20.266499161

Subproblem 2

x + -7 = -13.266499161 Simplifying x + -7 = -13.266499161 Reorder the terms: -7 + x = -13.266499161 Solving -7 + x = -13.266499161 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 = -13.266499161 + 7 Combine like terms: -7 + 7 = 0 0 + x = -13.266499161 + 7 x = -13.266499161 + 7 Combine like terms: -13.266499161 + 7 = -6.266499161 x = -6.266499161 Simplifying x = -6.266499161

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.266499161, -6.266499161}

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