x(5+x)=10000

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Solution for x(5+x)=10000 equation:


Simplifying
x(5 + x) = 10000
(5 * x + x * x) = 10000
(5x + x2) = 10000

Solving
5x + x2 = 10000

Solving for variable 'x'.

Reorder the terms:
-10000 + 5x + x2 = 10000 + -10000

Combine like terms: 10000 + -10000 = 0
-10000 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '10000' to each side of the equation.
-10000 + 5x + 10000 + x2 = 0 + 10000

Reorder the terms:
-10000 + 10000 + 5x + x2 = 0 + 10000

Combine like terms: -10000 + 10000 = 0
0 + 5x + x2 = 0 + 10000
5x + x2 = 0 + 10000

Combine like terms: 0 + 10000 = 10000
5x + x2 = 10000

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 10000 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 10000 + 6.25

Combine like terms: 10000 + 6.25 = 10006.25
6.25 + 5x + x2 = 10006.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 10006.25

Calculate the square root of the right side: 100.031245119

Break this problem into two subproblems by setting 
(x + 2.5) equal to 100.031245119 and -100.031245119.

Subproblem 1

x + 2.5 = 100.031245119 Simplifying x + 2.5 = 100.031245119 Reorder the terms: 2.5 + x = 100.031245119 Solving 2.5 + x = 100.031245119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 100.031245119 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 100.031245119 + -2.5 x = 100.031245119 + -2.5 Combine like terms: 100.031245119 + -2.5 = 97.531245119 x = 97.531245119 Simplifying x = 97.531245119

Subproblem 2

x + 2.5 = -100.031245119 Simplifying x + 2.5 = -100.031245119 Reorder the terms: 2.5 + x = -100.031245119 Solving 2.5 + x = -100.031245119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -100.031245119 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -100.031245119 + -2.5 x = -100.031245119 + -2.5 Combine like terms: -100.031245119 + -2.5 = -102.531245119 x = -102.531245119 Simplifying x = -102.531245119

Solution

The solution to the problem is based on the solutions from the subproblems. x = {97.531245119, -102.531245119}

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