x^2-14x-13=6

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Solution for x^2-14x-13=6 equation:


Simplifying
x2 + -14x + -13 = 6

Reorder the terms:
-13 + -14x + x2 = 6

Solving
-13 + -14x + x2 = 6

Solving for variable 'x'.

Reorder the terms:
-13 + -6 + -14x + x2 = 6 + -6

Combine like terms: -13 + -6 = -19
-19 + -14x + x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-19 + -14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '19' to each side of the equation.
-19 + -14x + 19 + x2 = 0 + 19

Reorder the terms:
-19 + 19 + -14x + x2 = 0 + 19

Combine like terms: -19 + 19 = 0
0 + -14x + x2 = 0 + 19
-14x + x2 = 0 + 19

Combine like terms: 0 + 19 = 19
-14x + x2 = 19

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 = 19 + 49

Reorder the terms:
49 + -14x + x2 = 19 + 49

Combine like terms: 19 + 49 = 68
49 + -14x + x2 = 68

Factor a perfect square on the left side:
(x + -7)(x + -7) = 68

Calculate the square root of the right side: 8.246211251

Break this problem into two subproblems by setting 
(x + -7) equal to 8.246211251 and -8.246211251.

Subproblem 1

x + -7 = 8.246211251 Simplifying x + -7 = 8.246211251 Reorder the terms: -7 + x = 8.246211251 Solving -7 + x = 8.246211251 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 = 8.246211251 + 7 Combine like terms: -7 + 7 = 0 0 + x = 8.246211251 + 7 x = 8.246211251 + 7 Combine like terms: 8.246211251 + 7 = 15.246211251 x = 15.246211251 Simplifying x = 15.246211251

Subproblem 2

x + -7 = -8.246211251 Simplifying x + -7 = -8.246211251 Reorder the terms: -7 + x = -8.246211251 Solving -7 + x = -8.246211251 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 = -8.246211251 + 7 Combine like terms: -7 + 7 = 0 0 + x = -8.246211251 + 7 x = -8.246211251 + 7 Combine like terms: -8.246211251 + 7 = -1.246211251 x = -1.246211251 Simplifying x = -1.246211251

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.246211251, -1.246211251}

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