x*x-1000*x-1000*x-1000=0

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Solution for x*x-1000*x-1000*x-1000=0 equation:


Simplifying
x * x + -1000x + -1000x + -1000 = 0

Multiply x * x
x2 + -1000x + -1000x + -1000 = 0

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

Combine like terms: -1000x + -1000x = -2000x
-1000 + -2000x + x2 = 0

Solving
-1000 + -2000x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1000' to each side of the equation.
-1000 + -2000x + 1000 + x2 = 0 + 1000

Reorder the terms:
-1000 + 1000 + -2000x + x2 = 0 + 1000

Combine like terms: -1000 + 1000 = 0
0 + -2000x + x2 = 0 + 1000
-2000x + x2 = 0 + 1000

Combine like terms: 0 + 1000 = 1000
-2000x + x2 = 1000

The x term is -2000x.  Take half its coefficient (-1000).
Square it (1000000) and add it to both sides.

Add '1000000' to each side of the equation.
-2000x + 1000000 + x2 = 1000 + 1000000

Reorder the terms:
1000000 + -2000x + x2 = 1000 + 1000000

Combine like terms: 1000 + 1000000 = 1001000
1000000 + -2000x + x2 = 1001000

Factor a perfect square on the left side:
(x + -1000)(x + -1000) = 1001000

Calculate the square root of the right side: 1000.499875062

Break this problem into two subproblems by setting 
(x + -1000) equal to 1000.499875062 and -1000.499875062.

Subproblem 1

x + -1000 = 1000.499875062 Simplifying x + -1000 = 1000.499875062 Reorder the terms: -1000 + x = 1000.499875062 Solving -1000 + x = 1000.499875062 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1000' to each side of the equation. -1000 + 1000 + x = 1000.499875062 + 1000 Combine like terms: -1000 + 1000 = 0 0 + x = 1000.499875062 + 1000 x = 1000.499875062 + 1000 Combine like terms: 1000.499875062 + 1000 = 2000.499875062 x = 2000.499875062 Simplifying x = 2000.499875062

Subproblem 2

x + -1000 = -1000.499875062 Simplifying x + -1000 = -1000.499875062 Reorder the terms: -1000 + x = -1000.499875062 Solving -1000 + x = -1000.499875062 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1000' to each side of the equation. -1000 + 1000 + x = -1000.499875062 + 1000 Combine like terms: -1000 + 1000 = 0 0 + x = -1000.499875062 + 1000 x = -1000.499875062 + 1000 Combine like terms: -1000.499875062 + 1000 = -0.499875062 x = -0.499875062 Simplifying x = -0.499875062

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2000.499875062, -0.499875062}

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