x^2+2x-253=0

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Solution for x^2+2x-253=0 equation:


Simplifying
x2 + 2x + -253 = 0

Reorder the terms:
-253 + 2x + x2 = 0

Solving
-253 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '253' to each side of the equation.
-253 + 2x + 253 + x2 = 0 + 253

Reorder the terms:
-253 + 253 + 2x + x2 = 0 + 253

Combine like terms: -253 + 253 = 0
0 + 2x + x2 = 0 + 253
2x + x2 = 0 + 253

Combine like terms: 0 + 253 = 253
2x + x2 = 253

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 = 253 + 1

Reorder the terms:
1 + 2x + x2 = 253 + 1

Combine like terms: 253 + 1 = 254
1 + 2x + x2 = 254

Factor a perfect square on the left side:
(x + 1)(x + 1) = 254

Calculate the square root of the right side: 15.937377451

Break this problem into two subproblems by setting 
(x + 1) equal to 15.937377451 and -15.937377451.

Subproblem 1

x + 1 = 15.937377451 Simplifying x + 1 = 15.937377451 Reorder the terms: 1 + x = 15.937377451 Solving 1 + x = 15.937377451 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 = 15.937377451 + -1 Combine like terms: 1 + -1 = 0 0 + x = 15.937377451 + -1 x = 15.937377451 + -1 Combine like terms: 15.937377451 + -1 = 14.937377451 x = 14.937377451 Simplifying x = 14.937377451

Subproblem 2

x + 1 = -15.937377451 Simplifying x + 1 = -15.937377451 Reorder the terms: 1 + x = -15.937377451 Solving 1 + x = -15.937377451 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 = -15.937377451 + -1 Combine like terms: 1 + -1 = 0 0 + x = -15.937377451 + -1 x = -15.937377451 + -1 Combine like terms: -15.937377451 + -1 = -16.937377451 x = -16.937377451 Simplifying x = -16.937377451

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.937377451, -16.937377451}

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