2x^2-25x-4=0

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Solution for 2x^2-25x-4=0 equation:


Simplifying
2x2 + -25x + -4 = 0

Reorder the terms:
-4 + -25x + 2x2 = 0

Solving
-4 + -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'.
-2 + -12.5x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -12.5x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -12.5x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -12.5x + x2 = 0 + 2
-12.5x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-12.5x + x2 = 2

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 = 2 + 39.0625

Reorder the terms:
39.0625 + -12.5x + x2 = 2 + 39.0625

Combine like terms: 2 + 39.0625 = 41.0625
39.0625 + -12.5x + x2 = 41.0625

Factor a perfect square on the left side:
(x + -6.25)(x + -6.25) = 41.0625

Calculate the square root of the right side: 6.408002809

Break this problem into two subproblems by setting 
(x + -6.25) equal to 6.408002809 and -6.408002809.

Subproblem 1

x + -6.25 = 6.408002809 Simplifying x + -6.25 = 6.408002809 Reorder the terms: -6.25 + x = 6.408002809 Solving -6.25 + x = 6.408002809 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 = 6.408002809 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = 6.408002809 + 6.25 x = 6.408002809 + 6.25 Combine like terms: 6.408002809 + 6.25 = 12.658002809 x = 12.658002809 Simplifying x = 12.658002809

Subproblem 2

x + -6.25 = -6.408002809 Simplifying x + -6.25 = -6.408002809 Reorder the terms: -6.25 + x = -6.408002809 Solving -6.25 + x = -6.408002809 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 = -6.408002809 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = -6.408002809 + 6.25 x = -6.408002809 + 6.25 Combine like terms: -6.408002809 + 6.25 = -0.158002809 x = -0.158002809 Simplifying x = -0.158002809

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.658002809, -0.158002809}

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