x^2+118x-120=0

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Solution for x^2+118x-120=0 equation:


Simplifying
x2 + 118x + -120 = 0

Reorder the terms:
-120 + 118x + x2 = 0

Solving
-120 + 118x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '120' to each side of the equation.
-120 + 118x + 120 + x2 = 0 + 120

Reorder the terms:
-120 + 120 + 118x + x2 = 0 + 120

Combine like terms: -120 + 120 = 0
0 + 118x + x2 = 0 + 120
118x + x2 = 0 + 120

Combine like terms: 0 + 120 = 120
118x + x2 = 120

The x term is 118x.  Take half its coefficient (59).
Square it (3481) and add it to both sides.

Add '3481' to each side of the equation.
118x + 3481 + x2 = 120 + 3481

Reorder the terms:
3481 + 118x + x2 = 120 + 3481

Combine like terms: 120 + 3481 = 3601
3481 + 118x + x2 = 3601

Factor a perfect square on the left side:
(x + 59)(x + 59) = 3601

Calculate the square root of the right side: 60.008332755

Break this problem into two subproblems by setting 
(x + 59) equal to 60.008332755 and -60.008332755.

Subproblem 1

x + 59 = 60.008332755 Simplifying x + 59 = 60.008332755 Reorder the terms: 59 + x = 60.008332755 Solving 59 + x = 60.008332755 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-59' to each side of the equation. 59 + -59 + x = 60.008332755 + -59 Combine like terms: 59 + -59 = 0 0 + x = 60.008332755 + -59 x = 60.008332755 + -59 Combine like terms: 60.008332755 + -59 = 1.008332755 x = 1.008332755 Simplifying x = 1.008332755

Subproblem 2

x + 59 = -60.008332755 Simplifying x + 59 = -60.008332755 Reorder the terms: 59 + x = -60.008332755 Solving 59 + x = -60.008332755 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-59' to each side of the equation. 59 + -59 + x = -60.008332755 + -59 Combine like terms: 59 + -59 = 0 0 + x = -60.008332755 + -59 x = -60.008332755 + -59 Combine like terms: -60.008332755 + -59 = -119.008332755 x = -119.008332755 Simplifying x = -119.008332755

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.008332755, -119.008332755}

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