x^2+x-4000=0

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Solution for x^2+x-4000=0 equation:


Simplifying
x2 + x + -4000 = 0

Reorder the terms:
-4000 + x + x2 = 0

Solving
-4000 + x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '4000' to each side of the equation.
-4000 + x + 4000 + x2 = 0 + 4000

Reorder the terms:
-4000 + 4000 + x + x2 = 0 + 4000

Combine like terms: -4000 + 4000 = 0
0 + x + x2 = 0 + 4000
x + x2 = 0 + 4000

Combine like terms: 0 + 4000 = 4000
x + x2 = 4000

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 4000 + 0.25

Reorder the terms:
0.25 + x + x2 = 4000 + 0.25

Combine like terms: 4000 + 0.25 = 4000.25
0.25 + x + x2 = 4000.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 4000.25

Calculate the square root of the right side: 63.247529596

Break this problem into two subproblems by setting 
(x + 0.5) equal to 63.247529596 and -63.247529596.

Subproblem 1

x + 0.5 = 63.247529596 Simplifying x + 0.5 = 63.247529596 Reorder the terms: 0.5 + x = 63.247529596 Solving 0.5 + x = 63.247529596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 63.247529596 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 63.247529596 + -0.5 x = 63.247529596 + -0.5 Combine like terms: 63.247529596 + -0.5 = 62.747529596 x = 62.747529596 Simplifying x = 62.747529596

Subproblem 2

x + 0.5 = -63.247529596 Simplifying x + 0.5 = -63.247529596 Reorder the terms: 0.5 + x = -63.247529596 Solving 0.5 + x = -63.247529596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -63.247529596 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -63.247529596 + -0.5 x = -63.247529596 + -0.5 Combine like terms: -63.247529596 + -0.5 = -63.747529596 x = -63.747529596 Simplifying x = -63.747529596

Solution

The solution to the problem is based on the solutions from the subproblems. x = {62.747529596, -63.747529596}

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