x^2+260x-3120=0

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Solution for x^2+260x-3120=0 equation:


Simplifying
x2 + 260x + -3120 = 0

Reorder the terms:
-3120 + 260x + x2 = 0

Solving
-3120 + 260x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '3120' to each side of the equation.
-3120 + 260x + 3120 + x2 = 0 + 3120

Reorder the terms:
-3120 + 3120 + 260x + x2 = 0 + 3120

Combine like terms: -3120 + 3120 = 0
0 + 260x + x2 = 0 + 3120
260x + x2 = 0 + 3120

Combine like terms: 0 + 3120 = 3120
260x + x2 = 3120

The x term is 260x.  Take half its coefficient (130).
Square it (16900) and add it to both sides.

Add '16900' to each side of the equation.
260x + 16900 + x2 = 3120 + 16900

Reorder the terms:
16900 + 260x + x2 = 3120 + 16900

Combine like terms: 3120 + 16900 = 20020
16900 + 260x + x2 = 20020

Factor a perfect square on the left side:
(x + 130)(x + 130) = 20020

Calculate the square root of the right side: 141.492049247

Break this problem into two subproblems by setting 
(x + 130) equal to 141.492049247 and -141.492049247.

Subproblem 1

x + 130 = 141.492049247 Simplifying x + 130 = 141.492049247 Reorder the terms: 130 + x = 141.492049247 Solving 130 + x = 141.492049247 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-130' to each side of the equation. 130 + -130 + x = 141.492049247 + -130 Combine like terms: 130 + -130 = 0 0 + x = 141.492049247 + -130 x = 141.492049247 + -130 Combine like terms: 141.492049247 + -130 = 11.492049247 x = 11.492049247 Simplifying x = 11.492049247

Subproblem 2

x + 130 = -141.492049247 Simplifying x + 130 = -141.492049247 Reorder the terms: 130 + x = -141.492049247 Solving 130 + x = -141.492049247 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-130' to each side of the equation. 130 + -130 + x = -141.492049247 + -130 Combine like terms: 130 + -130 = 0 0 + x = -141.492049247 + -130 x = -141.492049247 + -130 Combine like terms: -141.492049247 + -130 = -271.492049247 x = -271.492049247 Simplifying x = -271.492049247

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.492049247, -271.492049247}

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