x^2-14x-13=10

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Solution for x^2-14x-13=10 equation:


Simplifying
x2 + -14x + -13 = 10

Reorder the terms:
-13 + -14x + x2 = 10

Solving
-13 + -14x + x2 = 10

Solving for variable 'x'.

Reorder the terms:
-13 + -10 + -14x + x2 = 10 + -10

Combine like terms: -13 + -10 = -23
-23 + -14x + x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-23 + -14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '23' to each side of the equation.
-23 + -14x + 23 + x2 = 0 + 23

Reorder the terms:
-23 + 23 + -14x + x2 = 0 + 23

Combine like terms: -23 + 23 = 0
0 + -14x + x2 = 0 + 23
-14x + x2 = 0 + 23

Combine like terms: 0 + 23 = 23
-14x + x2 = 23

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 = 23 + 49

Reorder the terms:
49 + -14x + x2 = 23 + 49

Combine like terms: 23 + 49 = 72
49 + -14x + x2 = 72

Factor a perfect square on the left side:
(x + -7)(x + -7) = 72

Calculate the square root of the right side: 8.485281374

Break this problem into two subproblems by setting 
(x + -7) equal to 8.485281374 and -8.485281374.

Subproblem 1

x + -7 = 8.485281374 Simplifying x + -7 = 8.485281374 Reorder the terms: -7 + x = 8.485281374 Solving -7 + x = 8.485281374 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 = 8.485281374 + 7 Combine like terms: -7 + 7 = 0 0 + x = 8.485281374 + 7 x = 8.485281374 + 7 Combine like terms: 8.485281374 + 7 = 15.485281374 x = 15.485281374 Simplifying x = 15.485281374

Subproblem 2

x + -7 = -8.485281374 Simplifying x + -7 = -8.485281374 Reorder the terms: -7 + x = -8.485281374 Solving -7 + x = -8.485281374 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 = -8.485281374 + 7 Combine like terms: -7 + 7 = 0 0 + x = -8.485281374 + 7 x = -8.485281374 + 7 Combine like terms: -8.485281374 + 7 = -1.485281374 x = -1.485281374 Simplifying x = -1.485281374

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.485281374, -1.485281374}

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