2x^2-26x=23

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Solution for 2x^2-26x=23 equation:


Simplifying
2x2 + -26x = 23

Reorder the terms:
-26x + 2x2 = 23

Solving
-26x + 2x2 = 23

Solving for variable 'x'.

Reorder the terms:
-23 + -26x + 2x2 = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + -26x + 2x2 = 0

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

Divide each side by '2'.
-11.5 + -13x + x2 = 0

Move the constant term to the right:

Add '11.5' to each side of the equation.
-11.5 + -13x + 11.5 + x2 = 0 + 11.5

Reorder the terms:
-11.5 + 11.5 + -13x + x2 = 0 + 11.5

Combine like terms: -11.5 + 11.5 = 0.0
0.0 + -13x + x2 = 0 + 11.5
-13x + x2 = 0 + 11.5

Combine like terms: 0 + 11.5 = 11.5
-13x + x2 = 11.5

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 = 11.5 + 42.25

Reorder the terms:
42.25 + -13x + x2 = 11.5 + 42.25

Combine like terms: 11.5 + 42.25 = 53.75
42.25 + -13x + x2 = 53.75

Factor a perfect square on the left side:
(x + -6.5)(x + -6.5) = 53.75

Calculate the square root of the right side: 7.331439149

Break this problem into two subproblems by setting 
(x + -6.5) equal to 7.331439149 and -7.331439149.

Subproblem 1

x + -6.5 = 7.331439149 Simplifying x + -6.5 = 7.331439149 Reorder the terms: -6.5 + x = 7.331439149 Solving -6.5 + x = 7.331439149 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 = 7.331439149 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 7.331439149 + 6.5 x = 7.331439149 + 6.5 Combine like terms: 7.331439149 + 6.5 = 13.831439149 x = 13.831439149 Simplifying x = 13.831439149

Subproblem 2

x + -6.5 = -7.331439149 Simplifying x + -6.5 = -7.331439149 Reorder the terms: -6.5 + x = -7.331439149 Solving -6.5 + x = -7.331439149 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 = -7.331439149 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -7.331439149 + 6.5 x = -7.331439149 + 6.5 Combine like terms: -7.331439149 + 6.5 = -0.831439149 x = -0.831439149 Simplifying x = -0.831439149

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.831439149, -0.831439149}

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