x^2+2x-4998=0

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Solution for x^2+2x-4998=0 equation:


Simplifying
x2 + 2x + -4998 = 0

Reorder the terms:
-4998 + 2x + x2 = 0

Solving
-4998 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '4998' to each side of the equation.
-4998 + 2x + 4998 + x2 = 0 + 4998

Reorder the terms:
-4998 + 4998 + 2x + x2 = 0 + 4998

Combine like terms: -4998 + 4998 = 0
0 + 2x + x2 = 0 + 4998
2x + x2 = 0 + 4998

Combine like terms: 0 + 4998 = 4998
2x + x2 = 4998

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 = 4998 + 1

Reorder the terms:
1 + 2x + x2 = 4998 + 1

Combine like terms: 4998 + 1 = 4999
1 + 2x + x2 = 4999

Factor a perfect square on the left side:
(x + 1)(x + 1) = 4999

Calculate the square root of the right side: 70.703606697

Break this problem into two subproblems by setting 
(x + 1) equal to 70.703606697 and -70.703606697.

Subproblem 1

x + 1 = 70.703606697 Simplifying x + 1 = 70.703606697 Reorder the terms: 1 + x = 70.703606697 Solving 1 + x = 70.703606697 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 = 70.703606697 + -1 Combine like terms: 1 + -1 = 0 0 + x = 70.703606697 + -1 x = 70.703606697 + -1 Combine like terms: 70.703606697 + -1 = 69.703606697 x = 69.703606697 Simplifying x = 69.703606697

Subproblem 2

x + 1 = -70.703606697 Simplifying x + 1 = -70.703606697 Reorder the terms: 1 + x = -70.703606697 Solving 1 + x = -70.703606697 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 = -70.703606697 + -1 Combine like terms: 1 + -1 = 0 0 + x = -70.703606697 + -1 x = -70.703606697 + -1 Combine like terms: -70.703606697 + -1 = -71.703606697 x = -71.703606697 Simplifying x = -71.703606697

Solution

The solution to the problem is based on the solutions from the subproblems. x = {69.703606697, -71.703606697}

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