x^2-120x-144=0

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Solution for x^2-120x-144=0 equation:


Simplifying
x2 + -120x + -144 = 0

Reorder the terms:
-144 + -120x + x2 = 0

Solving
-144 + -120x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + -120x + 144 + x2 = 0 + 144

Reorder the terms:
-144 + 144 + -120x + x2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + -120x + x2 = 0 + 144
-120x + x2 = 0 + 144

Combine like terms: 0 + 144 = 144
-120x + x2 = 144

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 = 144 + 3600

Reorder the terms:
3600 + -120x + x2 = 144 + 3600

Combine like terms: 144 + 3600 = 3744
3600 + -120x + x2 = 3744

Factor a perfect square on the left side:
(x + -60)(x + -60) = 3744

Calculate the square root of the right side: 61.188234163

Break this problem into two subproblems by setting 
(x + -60) equal to 61.188234163 and -61.188234163.

Subproblem 1

x + -60 = 61.188234163 Simplifying x + -60 = 61.188234163 Reorder the terms: -60 + x = 61.188234163 Solving -60 + x = 61.188234163 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 = 61.188234163 + 60 Combine like terms: -60 + 60 = 0 0 + x = 61.188234163 + 60 x = 61.188234163 + 60 Combine like terms: 61.188234163 + 60 = 121.188234163 x = 121.188234163 Simplifying x = 121.188234163

Subproblem 2

x + -60 = -61.188234163 Simplifying x + -60 = -61.188234163 Reorder the terms: -60 + x = -61.188234163 Solving -60 + x = -61.188234163 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 = -61.188234163 + 60 Combine like terms: -60 + 60 = 0 0 + x = -61.188234163 + 60 x = -61.188234163 + 60 Combine like terms: -61.188234163 + 60 = -1.188234163 x = -1.188234163 Simplifying x = -1.188234163

Solution

The solution to the problem is based on the solutions from the subproblems. x = {121.188234163, -1.188234163}

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