x^2-22x-120=0

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Solution for x^2-22x-120=0 equation:


Simplifying
x2 + -22x + -120 = 0

Reorder the terms:
-120 + -22x + x2 = 0

Solving
-120 + -22x + 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 + -22x + 120 + x2 = 0 + 120

Reorder the terms:
-120 + 120 + -22x + x2 = 0 + 120

Combine like terms: -120 + 120 = 0
0 + -22x + x2 = 0 + 120
-22x + x2 = 0 + 120

Combine like terms: 0 + 120 = 120
-22x + x2 = 120

The x term is -22x.  Take half its coefficient (-11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
-22x + 121 + x2 = 120 + 121

Reorder the terms:
121 + -22x + x2 = 120 + 121

Combine like terms: 120 + 121 = 241
121 + -22x + x2 = 241

Factor a perfect square on the left side:
(x + -11)(x + -11) = 241

Calculate the square root of the right side: 15.524174696

Break this problem into two subproblems by setting 
(x + -11) equal to 15.524174696 and -15.524174696.

Subproblem 1

x + -11 = 15.524174696 Simplifying x + -11 = 15.524174696 Reorder the terms: -11 + x = 15.524174696 Solving -11 + x = 15.524174696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = 15.524174696 + 11 Combine like terms: -11 + 11 = 0 0 + x = 15.524174696 + 11 x = 15.524174696 + 11 Combine like terms: 15.524174696 + 11 = 26.524174696 x = 26.524174696 Simplifying x = 26.524174696

Subproblem 2

x + -11 = -15.524174696 Simplifying x + -11 = -15.524174696 Reorder the terms: -11 + x = -15.524174696 Solving -11 + x = -15.524174696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = -15.524174696 + 11 Combine like terms: -11 + 11 = 0 0 + x = -15.524174696 + 11 x = -15.524174696 + 11 Combine like terms: -15.524174696 + 11 = -4.524174696 x = -4.524174696 Simplifying x = -4.524174696

Solution

The solution to the problem is based on the solutions from the subproblems. x = {26.524174696, -4.524174696}

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