x^2-23x-130=0

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Solution for x^2-23x-130=0 equation:


Simplifying
x2 + -23x + -130 = 0

Reorder the terms:
-130 + -23x + x2 = 0

Solving
-130 + -23x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '130' to each side of the equation.
-130 + -23x + 130 + x2 = 0 + 130

Reorder the terms:
-130 + 130 + -23x + x2 = 0 + 130

Combine like terms: -130 + 130 = 0
0 + -23x + x2 = 0 + 130
-23x + x2 = 0 + 130

Combine like terms: 0 + 130 = 130
-23x + x2 = 130

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 = 130 + 132.25

Reorder the terms:
132.25 + -23x + x2 = 130 + 132.25

Combine like terms: 130 + 132.25 = 262.25
132.25 + -23x + x2 = 262.25

Factor a perfect square on the left side:
(x + -11.5)(x + -11.5) = 262.25

Calculate the square root of the right side: 16.194134741

Break this problem into two subproblems by setting 
(x + -11.5) equal to 16.194134741 and -16.194134741.

Subproblem 1

x + -11.5 = 16.194134741 Simplifying x + -11.5 = 16.194134741 Reorder the terms: -11.5 + x = 16.194134741 Solving -11.5 + x = 16.194134741 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 = 16.194134741 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = 16.194134741 + 11.5 x = 16.194134741 + 11.5 Combine like terms: 16.194134741 + 11.5 = 27.694134741 x = 27.694134741 Simplifying x = 27.694134741

Subproblem 2

x + -11.5 = -16.194134741 Simplifying x + -11.5 = -16.194134741 Reorder the terms: -11.5 + x = -16.194134741 Solving -11.5 + x = -16.194134741 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 = -16.194134741 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = -16.194134741 + 11.5 x = -16.194134741 + 11.5 Combine like terms: -16.194134741 + 11.5 = -4.694134741 x = -4.694134741 Simplifying x = -4.694134741

Solution

The solution to the problem is based on the solutions from the subproblems. x = {27.694134741, -4.694134741}

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