x^2-13x=-14

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


Simplifying
x2 + -13x = -14

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

Solving
-13x + x2 = -14

Solving for variable 'x'.

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

Combine like terms: -14 + 14 = 0
14 + -13x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + -13x + -14 + x2 = 0 + -14

Reorder the terms:
14 + -14 + -13x + x2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + -13x + x2 = 0 + -14
-13x + x2 = 0 + -14

Combine like terms: 0 + -14 = -14
-13x + x2 = -14

The x term is -13x.  Take half its coefficient (-6.5).
Square it (42.25) and add it to both sides.

Add '42.25' to each side of the equation.
-13x + 42.25 + x2 = -14 + 42.25

Reorder the terms:
42.25 + -13x + x2 = -14 + 42.25

Combine like terms: -14 + 42.25 = 28.25
42.25 + -13x + x2 = 28.25

Factor a perfect square on the left side:
(x + -6.5)(x + -6.5) = 28.25

Calculate the square root of the right side: 5.315072906

Break this problem into two subproblems by setting 
(x + -6.5) equal to 5.315072906 and -5.315072906.

Subproblem 1

x + -6.5 = 5.315072906 Simplifying x + -6.5 = 5.315072906 Reorder the terms: -6.5 + x = 5.315072906 Solving -6.5 + x = 5.315072906 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = 5.315072906 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 5.315072906 + 6.5 x = 5.315072906 + 6.5 Combine like terms: 5.315072906 + 6.5 = 11.815072906 x = 11.815072906 Simplifying x = 11.815072906

Subproblem 2

x + -6.5 = -5.315072906 Simplifying x + -6.5 = -5.315072906 Reorder the terms: -6.5 + x = -5.315072906 Solving -6.5 + x = -5.315072906 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = -5.315072906 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -5.315072906 + 6.5 x = -5.315072906 + 6.5 Combine like terms: -5.315072906 + 6.5 = 1.184927094 x = 1.184927094 Simplifying x = 1.184927094

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.815072906, 1.184927094}

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