x^2+23x-39=

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Solution for x^2+23x-39= equation:


Simplifying
x2 + 23x + -39 = 0

Reorder the terms:
-39 + 23x + x2 = 0

Solving
-39 + 23x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '39' to each side of the equation.
-39 + 23x + 39 + x2 = 0 + 39

Reorder the terms:
-39 + 39 + 23x + x2 = 0 + 39

Combine like terms: -39 + 39 = 0
0 + 23x + x2 = 0 + 39
23x + x2 = 0 + 39

Combine like terms: 0 + 39 = 39
23x + x2 = 39

The x term is 23x.  Take half its coefficient (11.5).
Square it (132.25) and add it to both sides.

Add '132.25' to each side of the equation.
23x + 132.25 + x2 = 39 + 132.25

Reorder the terms:
132.25 + 23x + x2 = 39 + 132.25

Combine like terms: 39 + 132.25 = 171.25
132.25 + 23x + x2 = 171.25

Factor a perfect square on the left side:
(x + 11.5)(x + 11.5) = 171.25

Calculate the square root of the right side: 13.086252328

Break this problem into two subproblems by setting 
(x + 11.5) equal to 13.086252328 and -13.086252328.

Subproblem 1

x + 11.5 = 13.086252328 Simplifying x + 11.5 = 13.086252328 Reorder the terms: 11.5 + x = 13.086252328 Solving 11.5 + x = 13.086252328 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.5' to each side of the equation. 11.5 + -11.5 + x = 13.086252328 + -11.5 Combine like terms: 11.5 + -11.5 = 0.0 0.0 + x = 13.086252328 + -11.5 x = 13.086252328 + -11.5 Combine like terms: 13.086252328 + -11.5 = 1.586252328 x = 1.586252328 Simplifying x = 1.586252328

Subproblem 2

x + 11.5 = -13.086252328 Simplifying x + 11.5 = -13.086252328 Reorder the terms: 11.5 + x = -13.086252328 Solving 11.5 + x = -13.086252328 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.5' to each side of the equation. 11.5 + -11.5 + x = -13.086252328 + -11.5 Combine like terms: 11.5 + -11.5 = 0.0 0.0 + x = -13.086252328 + -11.5 x = -13.086252328 + -11.5 Combine like terms: -13.086252328 + -11.5 = -24.586252328 x = -24.586252328 Simplifying x = -24.586252328

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.586252328, -24.586252328}

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