x(x+200)=1000

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Solution for x(x+200)=1000 equation:


Simplifying
x(x + 200) = 1000

Reorder the terms:
x(200 + x) = 1000
(200 * x + x * x) = 1000
(200x + x2) = 1000

Solving
200x + x2 = 1000

Solving for variable 'x'.

Reorder the terms:
-1000 + 200x + x2 = 1000 + -1000

Combine like terms: 1000 + -1000 = 0
-1000 + 200x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1000' to each side of the equation.
-1000 + 200x + 1000 + x2 = 0 + 1000

Reorder the terms:
-1000 + 1000 + 200x + x2 = 0 + 1000

Combine like terms: -1000 + 1000 = 0
0 + 200x + x2 = 0 + 1000
200x + x2 = 0 + 1000

Combine like terms: 0 + 1000 = 1000
200x + x2 = 1000

The x term is 200x.  Take half its coefficient (100).
Square it (10000) and add it to both sides.

Add '10000' to each side of the equation.
200x + 10000 + x2 = 1000 + 10000

Reorder the terms:
10000 + 200x + x2 = 1000 + 10000

Combine like terms: 1000 + 10000 = 11000
10000 + 200x + x2 = 11000

Factor a perfect square on the left side:
(x + 100)(x + 100) = 11000

Calculate the square root of the right side: 104.880884817

Break this problem into two subproblems by setting 
(x + 100) equal to 104.880884817 and -104.880884817.

Subproblem 1

x + 100 = 104.880884817 Simplifying x + 100 = 104.880884817 Reorder the terms: 100 + x = 104.880884817 Solving 100 + x = 104.880884817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-100' to each side of the equation. 100 + -100 + x = 104.880884817 + -100 Combine like terms: 100 + -100 = 0 0 + x = 104.880884817 + -100 x = 104.880884817 + -100 Combine like terms: 104.880884817 + -100 = 4.880884817 x = 4.880884817 Simplifying x = 4.880884817

Subproblem 2

x + 100 = -104.880884817 Simplifying x + 100 = -104.880884817 Reorder the terms: 100 + x = -104.880884817 Solving 100 + x = -104.880884817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-100' to each side of the equation. 100 + -100 + x = -104.880884817 + -100 Combine like terms: 100 + -100 = 0 0 + x = -104.880884817 + -100 x = -104.880884817 + -100 Combine like terms: -104.880884817 + -100 = -204.880884817 x = -204.880884817 Simplifying x = -204.880884817

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.880884817, -204.880884817}

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