2x^2-25x-209=0

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Solution for 2x^2-25x-209=0 equation:


Simplifying
2x2 + -25x + -209 = 0

Reorder the terms:
-209 + -25x + 2x2 = 0

Solving
-209 + -25x + 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'.
-104.5 + -12.5x + x2 = 0

Move the constant term to the right:

Add '104.5' to each side of the equation.
-104.5 + -12.5x + 104.5 + x2 = 0 + 104.5

Reorder the terms:
-104.5 + 104.5 + -12.5x + x2 = 0 + 104.5

Combine like terms: -104.5 + 104.5 = 0.0
0.0 + -12.5x + x2 = 0 + 104.5
-12.5x + x2 = 0 + 104.5

Combine like terms: 0 + 104.5 = 104.5
-12.5x + x2 = 104.5

The x term is -12.5x.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5x + 39.0625 + x2 = 104.5 + 39.0625

Reorder the terms:
39.0625 + -12.5x + x2 = 104.5 + 39.0625

Combine like terms: 104.5 + 39.0625 = 143.5625
39.0625 + -12.5x + x2 = 143.5625

Factor a perfect square on the left side:
(x + -6.25)(x + -6.25) = 143.5625

Calculate the square root of the right side: 11.981756966

Break this problem into two subproblems by setting 
(x + -6.25) equal to 11.981756966 and -11.981756966.

Subproblem 1

x + -6.25 = 11.981756966 Simplifying x + -6.25 = 11.981756966 Reorder the terms: -6.25 + x = 11.981756966 Solving -6.25 + x = 11.981756966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = 11.981756966 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = 11.981756966 + 6.25 x = 11.981756966 + 6.25 Combine like terms: 11.981756966 + 6.25 = 18.231756966 x = 18.231756966 Simplifying x = 18.231756966

Subproblem 2

x + -6.25 = -11.981756966 Simplifying x + -6.25 = -11.981756966 Reorder the terms: -6.25 + x = -11.981756966 Solving -6.25 + x = -11.981756966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = -11.981756966 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = -11.981756966 + 6.25 x = -11.981756966 + 6.25 Combine like terms: -11.981756966 + 6.25 = -5.731756966 x = -5.731756966 Simplifying x = -5.731756966

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.231756966, -5.731756966}

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