9x^2-17x-116=0

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Solution for 9x^2-17x-116=0 equation:


Simplifying
9x2 + -17x + -116 = 0

Reorder the terms:
-116 + -17x + 9x2 = 0

Solving
-116 + -17x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-12.88888889 + -1.888888889x + x2 = 0

Move the constant term to the right:

Add '12.88888889' to each side of the equation.
-12.88888889 + -1.888888889x + 12.88888889 + x2 = 0 + 12.88888889

Reorder the terms:
-12.88888889 + 12.88888889 + -1.888888889x + x2 = 0 + 12.88888889

Combine like terms: -12.88888889 + 12.88888889 = 0.00000000
0.00000000 + -1.888888889x + x2 = 0 + 12.88888889
-1.888888889x + x2 = 0 + 12.88888889

Combine like terms: 0 + 12.88888889 = 12.88888889
-1.888888889x + x2 = 12.88888889

The x term is -1.888888889x.  Take half its coefficient (-0.9444444445).
Square it (0.8919753087) and add it to both sides.

Add '0.8919753087' to each side of the equation.
-1.888888889x + 0.8919753087 + x2 = 12.88888889 + 0.8919753087

Reorder the terms:
0.8919753087 + -1.888888889x + x2 = 12.88888889 + 0.8919753087

Combine like terms: 12.88888889 + 0.8919753087 = 13.7808641987
0.8919753087 + -1.888888889x + x2 = 13.7808641987

Factor a perfect square on the left side:
(x + -0.9444444445)(x + -0.9444444445) = 13.7808641987

Calculate the square root of the right side: 3.712258638

Break this problem into two subproblems by setting 
(x + -0.9444444445) equal to 3.712258638 and -3.712258638.

Subproblem 1

x + -0.9444444445 = 3.712258638 Simplifying x + -0.9444444445 = 3.712258638 Reorder the terms: -0.9444444445 + x = 3.712258638 Solving -0.9444444445 + x = 3.712258638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9444444445' to each side of the equation. -0.9444444445 + 0.9444444445 + x = 3.712258638 + 0.9444444445 Combine like terms: -0.9444444445 + 0.9444444445 = 0.0000000000 0.0000000000 + x = 3.712258638 + 0.9444444445 x = 3.712258638 + 0.9444444445 Combine like terms: 3.712258638 + 0.9444444445 = 4.6567030825 x = 4.6567030825 Simplifying x = 4.6567030825

Subproblem 2

x + -0.9444444445 = -3.712258638 Simplifying x + -0.9444444445 = -3.712258638 Reorder the terms: -0.9444444445 + x = -3.712258638 Solving -0.9444444445 + x = -3.712258638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9444444445' to each side of the equation. -0.9444444445 + 0.9444444445 + x = -3.712258638 + 0.9444444445 Combine like terms: -0.9444444445 + 0.9444444445 = 0.0000000000 0.0000000000 + x = -3.712258638 + 0.9444444445 x = -3.712258638 + 0.9444444445 Combine like terms: -3.712258638 + 0.9444444445 = -2.7678141935 x = -2.7678141935 Simplifying x = -2.7678141935

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.6567030825, -2.7678141935}

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