4x^2-17x-108=0

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Solution for 4x^2-17x-108=0 equation:


Simplifying
4x2 + -17x + -108 = 0

Reorder the terms:
-108 + -17x + 4x2 = 0

Solving
-108 + -17x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-27 + -4.25x + x2 = 0

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -4.25x + 27 + x2 = 0 + 27

Reorder the terms:
-27 + 27 + -4.25x + x2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -4.25x + x2 = 0 + 27
-4.25x + x2 = 0 + 27

Combine like terms: 0 + 27 = 27
-4.25x + x2 = 27

The x term is -4.25x.  Take half its coefficient (-2.125).
Square it (4.515625) and add it to both sides.

Add '4.515625' to each side of the equation.
-4.25x + 4.515625 + x2 = 27 + 4.515625

Reorder the terms:
4.515625 + -4.25x + x2 = 27 + 4.515625

Combine like terms: 27 + 4.515625 = 31.515625
4.515625 + -4.25x + x2 = 31.515625

Factor a perfect square on the left side:
(x + -2.125)(x + -2.125) = 31.515625

Calculate the square root of the right side: 5.613877893

Break this problem into two subproblems by setting 
(x + -2.125) equal to 5.613877893 and -5.613877893.

Subproblem 1

x + -2.125 = 5.613877893 Simplifying x + -2.125 = 5.613877893 Reorder the terms: -2.125 + x = 5.613877893 Solving -2.125 + x = 5.613877893 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = 5.613877893 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = 5.613877893 + 2.125 x = 5.613877893 + 2.125 Combine like terms: 5.613877893 + 2.125 = 7.738877893 x = 7.738877893 Simplifying x = 7.738877893

Subproblem 2

x + -2.125 = -5.613877893 Simplifying x + -2.125 = -5.613877893 Reorder the terms: -2.125 + x = -5.613877893 Solving -2.125 + x = -5.613877893 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = -5.613877893 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = -5.613877893 + 2.125 x = -5.613877893 + 2.125 Combine like terms: -5.613877893 + 2.125 = -3.488877893 x = -3.488877893 Simplifying x = -3.488877893

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.738877893, -3.488877893}

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