x^2+2x-176=0

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Solution for x^2+2x-176=0 equation:


Simplifying
x2 + 2x + -176 = 0

Reorder the terms:
-176 + 2x + x2 = 0

Solving
-176 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '176' to each side of the equation.
-176 + 2x + 176 + x2 = 0 + 176

Reorder the terms:
-176 + 176 + 2x + x2 = 0 + 176

Combine like terms: -176 + 176 = 0
0 + 2x + x2 = 0 + 176
2x + x2 = 0 + 176

Combine like terms: 0 + 176 = 176
2x + x2 = 176

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 = 176 + 1

Reorder the terms:
1 + 2x + x2 = 176 + 1

Combine like terms: 176 + 1 = 177
1 + 2x + x2 = 177

Factor a perfect square on the left side:
(x + 1)(x + 1) = 177

Calculate the square root of the right side: 13.304134696

Break this problem into two subproblems by setting 
(x + 1) equal to 13.304134696 and -13.304134696.

Subproblem 1

x + 1 = 13.304134696 Simplifying x + 1 = 13.304134696 Reorder the terms: 1 + x = 13.304134696 Solving 1 + x = 13.304134696 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 = 13.304134696 + -1 Combine like terms: 1 + -1 = 0 0 + x = 13.304134696 + -1 x = 13.304134696 + -1 Combine like terms: 13.304134696 + -1 = 12.304134696 x = 12.304134696 Simplifying x = 12.304134696

Subproblem 2

x + 1 = -13.304134696 Simplifying x + 1 = -13.304134696 Reorder the terms: 1 + x = -13.304134696 Solving 1 + x = -13.304134696 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 = -13.304134696 + -1 Combine like terms: 1 + -1 = 0 0 + x = -13.304134696 + -1 x = -13.304134696 + -1 Combine like terms: -13.304134696 + -1 = -14.304134696 x = -14.304134696 Simplifying x = -14.304134696

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.304134696, -14.304134696}

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