x^2-2x-2186=0

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Solution for x^2-2x-2186=0 equation:


Simplifying
x2 + -2x + -2186 = 0

Reorder the terms:
-2186 + -2x + x2 = 0

Solving
-2186 + -2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2186' to each side of the equation.
-2186 + -2x + 2186 + x2 = 0 + 2186

Reorder the terms:
-2186 + 2186 + -2x + x2 = 0 + 2186

Combine like terms: -2186 + 2186 = 0
0 + -2x + x2 = 0 + 2186
-2x + x2 = 0 + 2186

Combine like terms: 0 + 2186 = 2186
-2x + x2 = 2186

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 = 2186 + 1

Reorder the terms:
1 + -2x + x2 = 2186 + 1

Combine like terms: 2186 + 1 = 2187
1 + -2x + x2 = 2187

Factor a perfect square on the left side:
(x + -1)(x + -1) = 2187

Calculate the square root of the right side: 46.765371804

Break this problem into two subproblems by setting 
(x + -1) equal to 46.765371804 and -46.765371804.

Subproblem 1

x + -1 = 46.765371804 Simplifying x + -1 = 46.765371804 Reorder the terms: -1 + x = 46.765371804 Solving -1 + x = 46.765371804 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 = 46.765371804 + 1 Combine like terms: -1 + 1 = 0 0 + x = 46.765371804 + 1 x = 46.765371804 + 1 Combine like terms: 46.765371804 + 1 = 47.765371804 x = 47.765371804 Simplifying x = 47.765371804

Subproblem 2

x + -1 = -46.765371804 Simplifying x + -1 = -46.765371804 Reorder the terms: -1 + x = -46.765371804 Solving -1 + x = -46.765371804 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 = -46.765371804 + 1 Combine like terms: -1 + 1 = 0 0 + x = -46.765371804 + 1 x = -46.765371804 + 1 Combine like terms: -46.765371804 + 1 = -45.765371804 x = -45.765371804 Simplifying x = -45.765371804

Solution

The solution to the problem is based on the solutions from the subproblems. x = {47.765371804, -45.765371804}

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