2x^2-9x-500=0

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Solution for 2x^2-9x-500=0 equation:


Simplifying
2x2 + -9x + -500 = 0

Reorder the terms:
-500 + -9x + 2x2 = 0

Solving
-500 + -9x + 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'.
-250 + -4.5x + x2 = 0

Move the constant term to the right:

Add '250' to each side of the equation.
-250 + -4.5x + 250 + x2 = 0 + 250

Reorder the terms:
-250 + 250 + -4.5x + x2 = 0 + 250

Combine like terms: -250 + 250 = 0
0 + -4.5x + x2 = 0 + 250
-4.5x + x2 = 0 + 250

Combine like terms: 0 + 250 = 250
-4.5x + x2 = 250

The x term is -4.5x.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5x + 5.0625 + x2 = 250 + 5.0625

Reorder the terms:
5.0625 + -4.5x + x2 = 250 + 5.0625

Combine like terms: 250 + 5.0625 = 255.0625
5.0625 + -4.5x + x2 = 255.0625

Factor a perfect square on the left side:
(x + -2.25)(x + -2.25) = 255.0625

Calculate the square root of the right side: 15.970676254

Break this problem into two subproblems by setting 
(x + -2.25) equal to 15.970676254 and -15.970676254.

Subproblem 1

x + -2.25 = 15.970676254 Simplifying x + -2.25 = 15.970676254 Reorder the terms: -2.25 + x = 15.970676254 Solving -2.25 + x = 15.970676254 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = 15.970676254 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = 15.970676254 + 2.25 x = 15.970676254 + 2.25 Combine like terms: 15.970676254 + 2.25 = 18.220676254 x = 18.220676254 Simplifying x = 18.220676254

Subproblem 2

x + -2.25 = -15.970676254 Simplifying x + -2.25 = -15.970676254 Reorder the terms: -2.25 + x = -15.970676254 Solving -2.25 + x = -15.970676254 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = -15.970676254 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = -15.970676254 + 2.25 x = -15.970676254 + 2.25 Combine like terms: -15.970676254 + 2.25 = -13.720676254 x = -13.720676254 Simplifying x = -13.720676254

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.220676254, -13.720676254}

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