2x^2+26x-25=0

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


Simplifying
2x2 + 26x + -25 = 0

Reorder the terms:
-25 + 26x + 2x2 = 0

Solving
-25 + 26x + 2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-12.5 + 13x + x2 = 0

Move the constant term to the right:

Add '12.5' to each side of the equation.
-12.5 + 13x + 12.5 + x2 = 0 + 12.5

Reorder the terms:
-12.5 + 12.5 + 13x + x2 = 0 + 12.5

Combine like terms: -12.5 + 12.5 = 0.0
0.0 + 13x + x2 = 0 + 12.5
13x + x2 = 0 + 12.5

Combine like terms: 0 + 12.5 = 12.5
13x + x2 = 12.5

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 = 12.5 + 42.25

Reorder the terms:
42.25 + 13x + x2 = 12.5 + 42.25

Combine like terms: 12.5 + 42.25 = 54.75
42.25 + 13x + x2 = 54.75

Factor a perfect square on the left side:
(x + 6.5)(x + 6.5) = 54.75

Calculate the square root of the right side: 7.399324293

Break this problem into two subproblems by setting 
(x + 6.5) equal to 7.399324293 and -7.399324293.

Subproblem 1

x + 6.5 = 7.399324293 Simplifying x + 6.5 = 7.399324293 Reorder the terms: 6.5 + x = 7.399324293 Solving 6.5 + x = 7.399324293 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 = 7.399324293 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + x = 7.399324293 + -6.5 x = 7.399324293 + -6.5 Combine like terms: 7.399324293 + -6.5 = 0.899324293 x = 0.899324293 Simplifying x = 0.899324293

Subproblem 2

x + 6.5 = -7.399324293 Simplifying x + 6.5 = -7.399324293 Reorder the terms: 6.5 + x = -7.399324293 Solving 6.5 + x = -7.399324293 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 = -7.399324293 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + x = -7.399324293 + -6.5 x = -7.399324293 + -6.5 Combine like terms: -7.399324293 + -6.5 = -13.899324293 x = -13.899324293 Simplifying x = -13.899324293

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.899324293, -13.899324293}

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