2x^2-18x-269=0

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Solution for 2x^2-18x-269=0 equation:


Simplifying
2x2 + -18x + -269 = 0

Reorder the terms:
-269 + -18x + 2x2 = 0

Solving
-269 + -18x + 2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-134.5 + -9x + x2 = 0

Move the constant term to the right:

Add '134.5' to each side of the equation.
-134.5 + -9x + 134.5 + x2 = 0 + 134.5

Reorder the terms:
-134.5 + 134.5 + -9x + x2 = 0 + 134.5

Combine like terms: -134.5 + 134.5 = 0.0
0.0 + -9x + x2 = 0 + 134.5
-9x + x2 = 0 + 134.5

Combine like terms: 0 + 134.5 = 134.5
-9x + x2 = 134.5

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 134.5 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 134.5 + 20.25

Combine like terms: 134.5 + 20.25 = 154.75
20.25 + -9x + x2 = 154.75

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 154.75

Calculate the square root of the right side: 12.439855305

Break this problem into two subproblems by setting 
(x + -4.5) equal to 12.439855305 and -12.439855305.

Subproblem 1

x + -4.5 = 12.439855305 Simplifying x + -4.5 = 12.439855305 Reorder the terms: -4.5 + x = 12.439855305 Solving -4.5 + x = 12.439855305 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 12.439855305 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 12.439855305 + 4.5 x = 12.439855305 + 4.5 Combine like terms: 12.439855305 + 4.5 = 16.939855305 x = 16.939855305 Simplifying x = 16.939855305

Subproblem 2

x + -4.5 = -12.439855305 Simplifying x + -4.5 = -12.439855305 Reorder the terms: -4.5 + x = -12.439855305 Solving -4.5 + x = -12.439855305 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -12.439855305 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -12.439855305 + 4.5 x = -12.439855305 + 4.5 Combine like terms: -12.439855305 + 4.5 = -7.939855305 x = -7.939855305 Simplifying x = -7.939855305

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.939855305, -7.939855305}

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