x^2+8x-119=0

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Solution for x^2+8x-119=0 equation:


Simplifying
x2 + 8x + -119 = 0

Reorder the terms:
-119 + 8x + x2 = 0

Solving
-119 + 8x + 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 + 8x + 119 + x2 = 0 + 119

Reorder the terms:
-119 + 119 + 8x + x2 = 0 + 119

Combine like terms: -119 + 119 = 0
0 + 8x + x2 = 0 + 119
8x + x2 = 0 + 119

Combine like terms: 0 + 119 = 119
8x + x2 = 119

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = 119 + 16

Reorder the terms:
16 + 8x + x2 = 119 + 16

Combine like terms: 119 + 16 = 135
16 + 8x + x2 = 135

Factor a perfect square on the left side:
(x + 4)(x + 4) = 135

Calculate the square root of the right side: 11.618950039

Break this problem into two subproblems by setting 
(x + 4) equal to 11.618950039 and -11.618950039.

Subproblem 1

x + 4 = 11.618950039 Simplifying x + 4 = 11.618950039 Reorder the terms: 4 + x = 11.618950039 Solving 4 + x = 11.618950039 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 11.618950039 + -4 Combine like terms: 4 + -4 = 0 0 + x = 11.618950039 + -4 x = 11.618950039 + -4 Combine like terms: 11.618950039 + -4 = 7.618950039 x = 7.618950039 Simplifying x = 7.618950039

Subproblem 2

x + 4 = -11.618950039 Simplifying x + 4 = -11.618950039 Reorder the terms: 4 + x = -11.618950039 Solving 4 + x = -11.618950039 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -11.618950039 + -4 Combine like terms: 4 + -4 = 0 0 + x = -11.618950039 + -4 x = -11.618950039 + -4 Combine like terms: -11.618950039 + -4 = -15.618950039 x = -15.618950039 Simplifying x = -15.618950039

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.618950039, -15.618950039}

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