x^2+4x-10000=0

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Solution for x^2+4x-10000=0 equation:


Simplifying
x2 + 4x + -10000 = 0

Reorder the terms:
-10000 + 4x + x2 = 0

Solving
-10000 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '10000' to each side of the equation.
-10000 + 4x + 10000 + x2 = 0 + 10000

Reorder the terms:
-10000 + 10000 + 4x + x2 = 0 + 10000

Combine like terms: -10000 + 10000 = 0
0 + 4x + x2 = 0 + 10000
4x + x2 = 0 + 10000

Combine like terms: 0 + 10000 = 10000
4x + x2 = 10000

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 10000 + 4

Reorder the terms:
4 + 4x + x2 = 10000 + 4

Combine like terms: 10000 + 4 = 10004
4 + 4x + x2 = 10004

Factor a perfect square on the left side:
(x + 2)(x + 2) = 10004

Calculate the square root of the right side: 100.019998

Break this problem into two subproblems by setting 
(x + 2) equal to 100.019998 and -100.019998.

Subproblem 1

x + 2 = 100.019998 Simplifying x + 2 = 100.019998 Reorder the terms: 2 + x = 100.019998 Solving 2 + x = 100.019998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 100.019998 + -2 Combine like terms: 2 + -2 = 0 0 + x = 100.019998 + -2 x = 100.019998 + -2 Combine like terms: 100.019998 + -2 = 98.019998 x = 98.019998 Simplifying x = 98.019998

Subproblem 2

x + 2 = -100.019998 Simplifying x + 2 = -100.019998 Reorder the terms: 2 + x = -100.019998 Solving 2 + x = -100.019998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -100.019998 + -2 Combine like terms: 2 + -2 = 0 0 + x = -100.019998 + -2 x = -100.019998 + -2 Combine like terms: -100.019998 + -2 = -102.019998 x = -102.019998 Simplifying x = -102.019998

Solution

The solution to the problem is based on the solutions from the subproblems. x = {98.019998, -102.019998}

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