x^2-120x-2=0

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


Simplifying
x2 + -120x + -2 = 0

Reorder the terms:
-2 + -120x + x2 = 0

Solving
-2 + -120x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -120x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -120x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -120x + x2 = 0 + 2
-120x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-120x + x2 = 2

The x term is -120x.  Take half its coefficient (-60).
Square it (3600) and add it to both sides.

Add '3600' to each side of the equation.
-120x + 3600 + x2 = 2 + 3600

Reorder the terms:
3600 + -120x + x2 = 2 + 3600

Combine like terms: 2 + 3600 = 3602
3600 + -120x + x2 = 3602

Factor a perfect square on the left side:
(x + -60)(x + -60) = 3602

Calculate the square root of the right side: 60.016664352

Break this problem into two subproblems by setting 
(x + -60) equal to 60.016664352 and -60.016664352.

Subproblem 1

x + -60 = 60.016664352 Simplifying x + -60 = 60.016664352 Reorder the terms: -60 + x = 60.016664352 Solving -60 + x = 60.016664352 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '60' to each side of the equation. -60 + 60 + x = 60.016664352 + 60 Combine like terms: -60 + 60 = 0 0 + x = 60.016664352 + 60 x = 60.016664352 + 60 Combine like terms: 60.016664352 + 60 = 120.016664352 x = 120.016664352 Simplifying x = 120.016664352

Subproblem 2

x + -60 = -60.016664352 Simplifying x + -60 = -60.016664352 Reorder the terms: -60 + x = -60.016664352 Solving -60 + x = -60.016664352 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '60' to each side of the equation. -60 + 60 + x = -60.016664352 + 60 Combine like terms: -60 + 60 = 0 0 + x = -60.016664352 + 60 x = -60.016664352 + 60 Combine like terms: -60.016664352 + 60 = -0.016664352 x = -0.016664352 Simplifying x = -0.016664352

Solution

The solution to the problem is based on the solutions from the subproblems. x = {120.016664352, -0.016664352}

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