x^2-23x-65=0

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Solution for x^2-23x-65=0 equation:


Simplifying
x2 + -23x + -65 = 0

Reorder the terms:
-65 + -23x + x2 = 0

Solving
-65 + -23x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '65' to each side of the equation.
-65 + -23x + 65 + x2 = 0 + 65

Reorder the terms:
-65 + 65 + -23x + x2 = 0 + 65

Combine like terms: -65 + 65 = 0
0 + -23x + x2 = 0 + 65
-23x + x2 = 0 + 65

Combine like terms: 0 + 65 = 65
-23x + x2 = 65

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 = 65 + 132.25

Reorder the terms:
132.25 + -23x + x2 = 65 + 132.25

Combine like terms: 65 + 132.25 = 197.25
132.25 + -23x + x2 = 197.25

Factor a perfect square on the left side:
(x + -11.5)(x + -11.5) = 197.25

Calculate the square root of the right side: 14.044571905

Break this problem into two subproblems by setting 
(x + -11.5) equal to 14.044571905 and -14.044571905.

Subproblem 1

x + -11.5 = 14.044571905 Simplifying x + -11.5 = 14.044571905 Reorder the terms: -11.5 + x = 14.044571905 Solving -11.5 + x = 14.044571905 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 = 14.044571905 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = 14.044571905 + 11.5 x = 14.044571905 + 11.5 Combine like terms: 14.044571905 + 11.5 = 25.544571905 x = 25.544571905 Simplifying x = 25.544571905

Subproblem 2

x + -11.5 = -14.044571905 Simplifying x + -11.5 = -14.044571905 Reorder the terms: -11.5 + x = -14.044571905 Solving -11.5 + x = -14.044571905 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 = -14.044571905 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = -14.044571905 + 11.5 x = -14.044571905 + 11.5 Combine like terms: -14.044571905 + 11.5 = -2.544571905 x = -2.544571905 Simplifying x = -2.544571905

Solution

The solution to the problem is based on the solutions from the subproblems. x = {25.544571905, -2.544571905}

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