x^2-2x=1900

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Solution for x^2-2x=1900 equation:


Simplifying
x2 + -2x = 1900

Reorder the terms:
-2x + x2 = 1900

Solving
-2x + x2 = 1900

Solving for variable 'x'.

Reorder the terms:
-1900 + -2x + x2 = 1900 + -1900

Combine like terms: 1900 + -1900 = 0
-1900 + -2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1900' to each side of the equation.
-1900 + -2x + 1900 + x2 = 0 + 1900

Reorder the terms:
-1900 + 1900 + -2x + x2 = 0 + 1900

Combine like terms: -1900 + 1900 = 0
0 + -2x + x2 = 0 + 1900
-2x + x2 = 0 + 1900

Combine like terms: 0 + 1900 = 1900
-2x + x2 = 1900

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 = 1900 + 1

Reorder the terms:
1 + -2x + x2 = 1900 + 1

Combine like terms: 1900 + 1 = 1901
1 + -2x + x2 = 1901

Factor a perfect square on the left side:
(x + -1)(x + -1) = 1901

Calculate the square root of the right side: 43.600458713

Break this problem into two subproblems by setting 
(x + -1) equal to 43.600458713 and -43.600458713.

Subproblem 1

x + -1 = 43.600458713 Simplifying x + -1 = 43.600458713 Reorder the terms: -1 + x = 43.600458713 Solving -1 + x = 43.600458713 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 = 43.600458713 + 1 Combine like terms: -1 + 1 = 0 0 + x = 43.600458713 + 1 x = 43.600458713 + 1 Combine like terms: 43.600458713 + 1 = 44.600458713 x = 44.600458713 Simplifying x = 44.600458713

Subproblem 2

x + -1 = -43.600458713 Simplifying x + -1 = -43.600458713 Reorder the terms: -1 + x = -43.600458713 Solving -1 + x = -43.600458713 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 = -43.600458713 + 1 Combine like terms: -1 + 1 = 0 0 + x = -43.600458713 + 1 x = -43.600458713 + 1 Combine like terms: -43.600458713 + 1 = -42.600458713 x = -42.600458713 Simplifying x = -42.600458713

Solution

The solution to the problem is based on the solutions from the subproblems. x = {44.600458713, -42.600458713}

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