x^2+2x-843=0

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Solution for x^2+2x-843=0 equation:


Simplifying
x2 + 2x + -843 = 0

Reorder the terms:
-843 + 2x + x2 = 0

Solving
-843 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '843' to each side of the equation.
-843 + 2x + 843 + x2 = 0 + 843

Reorder the terms:
-843 + 843 + 2x + x2 = 0 + 843

Combine like terms: -843 + 843 = 0
0 + 2x + x2 = 0 + 843
2x + x2 = 0 + 843

Combine like terms: 0 + 843 = 843
2x + x2 = 843

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 = 843 + 1

Reorder the terms:
1 + 2x + x2 = 843 + 1

Combine like terms: 843 + 1 = 844
1 + 2x + x2 = 844

Factor a perfect square on the left side:
(x + 1)(x + 1) = 844

Calculate the square root of the right side: 29.051678093

Break this problem into two subproblems by setting 
(x + 1) equal to 29.051678093 and -29.051678093.

Subproblem 1

x + 1 = 29.051678093 Simplifying x + 1 = 29.051678093 Reorder the terms: 1 + x = 29.051678093 Solving 1 + x = 29.051678093 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 = 29.051678093 + -1 Combine like terms: 1 + -1 = 0 0 + x = 29.051678093 + -1 x = 29.051678093 + -1 Combine like terms: 29.051678093 + -1 = 28.051678093 x = 28.051678093 Simplifying x = 28.051678093

Subproblem 2

x + 1 = -29.051678093 Simplifying x + 1 = -29.051678093 Reorder the terms: 1 + x = -29.051678093 Solving 1 + x = -29.051678093 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 = -29.051678093 + -1 Combine like terms: 1 + -1 = 0 0 + x = -29.051678093 + -1 x = -29.051678093 + -1 Combine like terms: -29.051678093 + -1 = -30.051678093 x = -30.051678093 Simplifying x = -30.051678093

Solution

The solution to the problem is based on the solutions from the subproblems. x = {28.051678093, -30.051678093}

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