x^2+25x+26=0

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Solution for x^2+25x+26=0 equation:


Simplifying
x2 + 25x + 26 = 0

Reorder the terms:
26 + 25x + x2 = 0

Solving
26 + 25x + 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 + 25x + -26 + x2 = 0 + -26

Reorder the terms:
26 + -26 + 25x + x2 = 0 + -26

Combine like terms: 26 + -26 = 0
0 + 25x + x2 = 0 + -26
25x + x2 = 0 + -26

Combine like terms: 0 + -26 = -26
25x + x2 = -26

The x term is 25x.  Take half its coefficient (12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
25x + 156.25 + x2 = -26 + 156.25

Reorder the terms:
156.25 + 25x + x2 = -26 + 156.25

Combine like terms: -26 + 156.25 = 130.25
156.25 + 25x + x2 = 130.25

Factor a perfect square on the left side:
(x + 12.5)(x + 12.5) = 130.25

Calculate the square root of the right side: 11.412712211

Break this problem into two subproblems by setting 
(x + 12.5) equal to 11.412712211 and -11.412712211.

Subproblem 1

x + 12.5 = 11.412712211 Simplifying x + 12.5 = 11.412712211 Reorder the terms: 12.5 + x = 11.412712211 Solving 12.5 + x = 11.412712211 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = 11.412712211 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = 11.412712211 + -12.5 x = 11.412712211 + -12.5 Combine like terms: 11.412712211 + -12.5 = -1.087287789 x = -1.087287789 Simplifying x = -1.087287789

Subproblem 2

x + 12.5 = -11.412712211 Simplifying x + 12.5 = -11.412712211 Reorder the terms: 12.5 + x = -11.412712211 Solving 12.5 + x = -11.412712211 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = -11.412712211 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = -11.412712211 + -12.5 x = -11.412712211 + -12.5 Combine like terms: -11.412712211 + -12.5 = -23.912712211 x = -23.912712211 Simplifying x = -23.912712211

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.087287789, -23.912712211}

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