1000=x(x-2)

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Solution for 1000=x(x-2) equation:


Simplifying
1000 = x(x + -2)

Reorder the terms:
1000 = x(-2 + x)
1000 = (-2 * x + x * x)
1000 = (-2x + x2)

Solving
1000 = -2x + x2

Solving for variable 'x'.

Reorder the terms:
1000 + 2x + -1x2 = -2x + 2x + x2 + -1x2

Combine like terms: -2x + 2x = 0
1000 + 2x + -1x2 = 0 + x2 + -1x2
1000 + 2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
1000 + 2x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-1000 + -2x + x2 = 0

Move the constant term to the right:

Add '1000' to each side of the equation.
-1000 + -2x + 1000 + x2 = 0 + 1000

Reorder the terms:
-1000 + 1000 + -2x + x2 = 0 + 1000

Combine like terms: -1000 + 1000 = 0
0 + -2x + x2 = 0 + 1000
-2x + x2 = 0 + 1000

Combine like terms: 0 + 1000 = 1000
-2x + x2 = 1000

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 = 1000 + 1

Reorder the terms:
1 + -2x + x2 = 1000 + 1

Combine like terms: 1000 + 1 = 1001
1 + -2x + x2 = 1001

Factor a perfect square on the left side:
(x + -1)(x + -1) = 1001

Calculate the square root of the right side: 31.638584039

Break this problem into two subproblems by setting 
(x + -1) equal to 31.638584039 and -31.638584039.

Subproblem 1

x + -1 = 31.638584039 Simplifying x + -1 = 31.638584039 Reorder the terms: -1 + x = 31.638584039 Solving -1 + x = 31.638584039 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 = 31.638584039 + 1 Combine like terms: -1 + 1 = 0 0 + x = 31.638584039 + 1 x = 31.638584039 + 1 Combine like terms: 31.638584039 + 1 = 32.638584039 x = 32.638584039 Simplifying x = 32.638584039

Subproblem 2

x + -1 = -31.638584039 Simplifying x + -1 = -31.638584039 Reorder the terms: -1 + x = -31.638584039 Solving -1 + x = -31.638584039 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 = -31.638584039 + 1 Combine like terms: -1 + 1 = 0 0 + x = -31.638584039 + 1 x = -31.638584039 + 1 Combine like terms: -31.638584039 + 1 = -30.638584039 x = -30.638584039 Simplifying x = -30.638584039

Solution

The solution to the problem is based on the solutions from the subproblems. x = {32.638584039, -30.638584039}

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