x^2+2x=5000

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Solution for x^2+2x=5000 equation:


Simplifying
x2 + 2x = 5000

Reorder the terms:
2x + x2 = 5000

Solving
2x + x2 = 5000

Solving for variable 'x'.

Reorder the terms:
-5000 + 2x + x2 = 5000 + -5000

Combine like terms: 5000 + -5000 = 0
-5000 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '5000' to each side of the equation.
-5000 + 2x + 5000 + x2 = 0 + 5000

Reorder the terms:
-5000 + 5000 + 2x + x2 = 0 + 5000

Combine like terms: -5000 + 5000 = 0
0 + 2x + x2 = 0 + 5000
2x + x2 = 0 + 5000

Combine like terms: 0 + 5000 = 5000
2x + x2 = 5000

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 5000 + 1

Reorder the terms:
1 + 2x + x2 = 5000 + 1

Combine like terms: 5000 + 1 = 5001
1 + 2x + x2 = 5001

Factor a perfect square on the left side:
(x + 1)(x + 1) = 5001

Calculate the square root of the right side: 70.717748833

Break this problem into two subproblems by setting 
(x + 1) equal to 70.717748833 and -70.717748833.

Subproblem 1

x + 1 = 70.717748833 Simplifying x + 1 = 70.717748833 Reorder the terms: 1 + x = 70.717748833 Solving 1 + x = 70.717748833 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 70.717748833 + -1 Combine like terms: 1 + -1 = 0 0 + x = 70.717748833 + -1 x = 70.717748833 + -1 Combine like terms: 70.717748833 + -1 = 69.717748833 x = 69.717748833 Simplifying x = 69.717748833

Subproblem 2

x + 1 = -70.717748833 Simplifying x + 1 = -70.717748833 Reorder the terms: 1 + x = -70.717748833 Solving 1 + x = -70.717748833 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -70.717748833 + -1 Combine like terms: 1 + -1 = 0 0 + x = -70.717748833 + -1 x = -70.717748833 + -1 Combine like terms: -70.717748833 + -1 = -71.717748833 x = -71.717748833 Simplifying x = -71.717748833

Solution

The solution to the problem is based on the solutions from the subproblems. x = {69.717748833, -71.717748833}

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