x^2-34x-120=0

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Solution for x^2-34x-120=0 equation:


Simplifying
x2 + -34x + -120 = 0

Reorder the terms:
-120 + -34x + x2 = 0

Solving
-120 + -34x + 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 + -34x + 120 + x2 = 0 + 120

Reorder the terms:
-120 + 120 + -34x + x2 = 0 + 120

Combine like terms: -120 + 120 = 0
0 + -34x + x2 = 0 + 120
-34x + x2 = 0 + 120

Combine like terms: 0 + 120 = 120
-34x + x2 = 120

The x term is -34x.  Take half its coefficient (-17).
Square it (289) and add it to both sides.

Add '289' to each side of the equation.
-34x + 289 + x2 = 120 + 289

Reorder the terms:
289 + -34x + x2 = 120 + 289

Combine like terms: 120 + 289 = 409
289 + -34x + x2 = 409

Factor a perfect square on the left side:
(x + -17)(x + -17) = 409

Calculate the square root of the right side: 20.223748416

Break this problem into two subproblems by setting 
(x + -17) equal to 20.223748416 and -20.223748416.

Subproblem 1

x + -17 = 20.223748416 Simplifying x + -17 = 20.223748416 Reorder the terms: -17 + x = 20.223748416 Solving -17 + x = 20.223748416 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17' to each side of the equation. -17 + 17 + x = 20.223748416 + 17 Combine like terms: -17 + 17 = 0 0 + x = 20.223748416 + 17 x = 20.223748416 + 17 Combine like terms: 20.223748416 + 17 = 37.223748416 x = 37.223748416 Simplifying x = 37.223748416

Subproblem 2

x + -17 = -20.223748416 Simplifying x + -17 = -20.223748416 Reorder the terms: -17 + x = -20.223748416 Solving -17 + x = -20.223748416 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17' to each side of the equation. -17 + 17 + x = -20.223748416 + 17 Combine like terms: -17 + 17 = 0 0 + x = -20.223748416 + 17 x = -20.223748416 + 17 Combine like terms: -20.223748416 + 17 = -3.223748416 x = -3.223748416 Simplifying x = -3.223748416

Solution

The solution to the problem is based on the solutions from the subproblems. x = {37.223748416, -3.223748416}

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