x^2+2x-119=0

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Solution for x^2+2x-119=0 equation:


Simplifying
x2 + 2x + -119 = 0

Reorder the terms:
-119 + 2x + x2 = 0

Solving
-119 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '119' to each side of the equation.
-119 + 2x + 119 + x2 = 0 + 119

Reorder the terms:
-119 + 119 + 2x + x2 = 0 + 119

Combine like terms: -119 + 119 = 0
0 + 2x + x2 = 0 + 119
2x + x2 = 0 + 119

Combine like terms: 0 + 119 = 119
2x + x2 = 119

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 = 119 + 1

Reorder the terms:
1 + 2x + x2 = 119 + 1

Combine like terms: 119 + 1 = 120
1 + 2x + x2 = 120

Factor a perfect square on the left side:
(x + 1)(x + 1) = 120

Calculate the square root of the right side: 10.95445115

Break this problem into two subproblems by setting 
(x + 1) equal to 10.95445115 and -10.95445115.

Subproblem 1

x + 1 = 10.95445115 Simplifying x + 1 = 10.95445115 Reorder the terms: 1 + x = 10.95445115 Solving 1 + x = 10.95445115 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 = 10.95445115 + -1 Combine like terms: 1 + -1 = 0 0 + x = 10.95445115 + -1 x = 10.95445115 + -1 Combine like terms: 10.95445115 + -1 = 9.95445115 x = 9.95445115 Simplifying x = 9.95445115

Subproblem 2

x + 1 = -10.95445115 Simplifying x + 1 = -10.95445115 Reorder the terms: 1 + x = -10.95445115 Solving 1 + x = -10.95445115 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 = -10.95445115 + -1 Combine like terms: 1 + -1 = 0 0 + x = -10.95445115 + -1 x = -10.95445115 + -1 Combine like terms: -10.95445115 + -1 = -11.95445115 x = -11.95445115 Simplifying x = -11.95445115

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.95445115, -11.95445115}

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