25x^2-128x-112=0

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Solution for 25x^2-128x-112=0 equation:


Simplifying
25x2 + -128x + -112 = 0

Reorder the terms:
-112 + -128x + 25x2 = 0

Solving
-112 + -128x + 25x2 = 0

Solving for variable 'x'.

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

Divide each side by '25'.
-4.48 + -5.12x + x2 = 0

Move the constant term to the right:

Add '4.48' to each side of the equation.
-4.48 + -5.12x + 4.48 + x2 = 0 + 4.48

Reorder the terms:
-4.48 + 4.48 + -5.12x + x2 = 0 + 4.48

Combine like terms: -4.48 + 4.48 = 0.00
0.00 + -5.12x + x2 = 0 + 4.48
-5.12x + x2 = 0 + 4.48

Combine like terms: 0 + 4.48 = 4.48
-5.12x + x2 = 4.48

The x term is -5.12x.  Take half its coefficient (-2.56).
Square it (6.5536) and add it to both sides.

Add '6.5536' to each side of the equation.
-5.12x + 6.5536 + x2 = 4.48 + 6.5536

Reorder the terms:
6.5536 + -5.12x + x2 = 4.48 + 6.5536

Combine like terms: 4.48 + 6.5536 = 11.0336
6.5536 + -5.12x + x2 = 11.0336

Factor a perfect square on the left side:
(x + -2.56)(x + -2.56) = 11.0336

Calculate the square root of the right side: 3.321686319

Break this problem into two subproblems by setting 
(x + -2.56) equal to 3.321686319 and -3.321686319.

Subproblem 1

x + -2.56 = 3.321686319 Simplifying x + -2.56 = 3.321686319 Reorder the terms: -2.56 + x = 3.321686319 Solving -2.56 + x = 3.321686319 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.56' to each side of the equation. -2.56 + 2.56 + x = 3.321686319 + 2.56 Combine like terms: -2.56 + 2.56 = 0.00 0.00 + x = 3.321686319 + 2.56 x = 3.321686319 + 2.56 Combine like terms: 3.321686319 + 2.56 = 5.881686319 x = 5.881686319 Simplifying x = 5.881686319

Subproblem 2

x + -2.56 = -3.321686319 Simplifying x + -2.56 = -3.321686319 Reorder the terms: -2.56 + x = -3.321686319 Solving -2.56 + x = -3.321686319 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.56' to each side of the equation. -2.56 + 2.56 + x = -3.321686319 + 2.56 Combine like terms: -2.56 + 2.56 = 0.00 0.00 + x = -3.321686319 + 2.56 x = -3.321686319 + 2.56 Combine like terms: -3.321686319 + 2.56 = -0.761686319 x = -0.761686319 Simplifying x = -0.761686319

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.881686319, -0.761686319}

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