17x^2-56x-112=0

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Solution for 17x^2-56x-112=0 equation:


Simplifying
17x2 + -56x + -112 = 0

Reorder the terms:
-112 + -56x + 17x2 = 0

Solving
-112 + -56x + 17x2 = 0

Solving for variable 'x'.

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

Divide each side by '17'.
-6.588235294 + -3.294117647x + x2 = 0

Move the constant term to the right:

Add '6.588235294' to each side of the equation.
-6.588235294 + -3.294117647x + 6.588235294 + x2 = 0 + 6.588235294

Reorder the terms:
-6.588235294 + 6.588235294 + -3.294117647x + x2 = 0 + 6.588235294

Combine like terms: -6.588235294 + 6.588235294 = 0.000000000
0.000000000 + -3.294117647x + x2 = 0 + 6.588235294
-3.294117647x + x2 = 0 + 6.588235294

Combine like terms: 0 + 6.588235294 = 6.588235294
-3.294117647x + x2 = 6.588235294

The x term is -3.294117647x.  Take half its coefficient (-1.647058824).
Square it (2.712802770) and add it to both sides.

Add '2.712802770' to each side of the equation.
-3.294117647x + 2.712802770 + x2 = 6.588235294 + 2.712802770

Reorder the terms:
2.712802770 + -3.294117647x + x2 = 6.588235294 + 2.712802770

Combine like terms: 6.588235294 + 2.712802770 = 9.301038064
2.712802770 + -3.294117647x + x2 = 9.301038064

Factor a perfect square on the left side:
(x + -1.647058824)(x + -1.647058824) = 9.301038064

Calculate the square root of the right side: 3.049760329

Break this problem into two subproblems by setting 
(x + -1.647058824) equal to 3.049760329 and -3.049760329.

Subproblem 1

x + -1.647058824 = 3.049760329 Simplifying x + -1.647058824 = 3.049760329 Reorder the terms: -1.647058824 + x = 3.049760329 Solving -1.647058824 + x = 3.049760329 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.647058824' to each side of the equation. -1.647058824 + 1.647058824 + x = 3.049760329 + 1.647058824 Combine like terms: -1.647058824 + 1.647058824 = 0.000000000 0.000000000 + x = 3.049760329 + 1.647058824 x = 3.049760329 + 1.647058824 Combine like terms: 3.049760329 + 1.647058824 = 4.696819153 x = 4.696819153 Simplifying x = 4.696819153

Subproblem 2

x + -1.647058824 = -3.049760329 Simplifying x + -1.647058824 = -3.049760329 Reorder the terms: -1.647058824 + x = -3.049760329 Solving -1.647058824 + x = -3.049760329 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.647058824' to each side of the equation. -1.647058824 + 1.647058824 + x = -3.049760329 + 1.647058824 Combine like terms: -1.647058824 + 1.647058824 = 0.000000000 0.000000000 + x = -3.049760329 + 1.647058824 x = -3.049760329 + 1.647058824 Combine like terms: -3.049760329 + 1.647058824 = -1.402701505 x = -1.402701505 Simplifying x = -1.402701505

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.696819153, -1.402701505}

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