x^2+26x-26=0

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Solution for x^2+26x-26=0 equation:


Simplifying
x2 + 26x + -26 = 0

Reorder the terms:
-26 + 26x + x2 = 0

Solving
-26 + 26x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '26' to each side of the equation.
-26 + 26x + 26 + x2 = 0 + 26

Reorder the terms:
-26 + 26 + 26x + x2 = 0 + 26

Combine like terms: -26 + 26 = 0
0 + 26x + x2 = 0 + 26
26x + x2 = 0 + 26

Combine like terms: 0 + 26 = 26
26x + x2 = 26

The x term is 26x.  Take half its coefficient (13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
26x + 169 + x2 = 26 + 169

Reorder the terms:
169 + 26x + x2 = 26 + 169

Combine like terms: 26 + 169 = 195
169 + 26x + x2 = 195

Factor a perfect square on the left side:
(x + 13)(x + 13) = 195

Calculate the square root of the right side: 13.964240044

Break this problem into two subproblems by setting 
(x + 13) equal to 13.964240044 and -13.964240044.

Subproblem 1

x + 13 = 13.964240044 Simplifying x + 13 = 13.964240044 Reorder the terms: 13 + x = 13.964240044 Solving 13 + x = 13.964240044 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + x = 13.964240044 + -13 Combine like terms: 13 + -13 = 0 0 + x = 13.964240044 + -13 x = 13.964240044 + -13 Combine like terms: 13.964240044 + -13 = 0.964240044 x = 0.964240044 Simplifying x = 0.964240044

Subproblem 2

x + 13 = -13.964240044 Simplifying x + 13 = -13.964240044 Reorder the terms: 13 + x = -13.964240044 Solving 13 + x = -13.964240044 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + x = -13.964240044 + -13 Combine like terms: 13 + -13 = 0 0 + x = -13.964240044 + -13 x = -13.964240044 + -13 Combine like terms: -13.964240044 + -13 = -26.964240044 x = -26.964240044 Simplifying x = -26.964240044

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.964240044, -26.964240044}

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