9x^2-62x-108=0

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Solution for 9x^2-62x-108=0 equation:


Simplifying
9x2 + -62x + -108 = 0

Reorder the terms:
-108 + -62x + 9x2 = 0

Solving
-108 + -62x + 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 + -6.888888889x + x2 = 0

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + -6.888888889x + 12 + x2 = 0 + 12

Reorder the terms:
-12 + 12 + -6.888888889x + x2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -6.888888889x + x2 = 0 + 12
-6.888888889x + x2 = 0 + 12

Combine like terms: 0 + 12 = 12
-6.888888889x + x2 = 12

The x term is -6.888888889x.  Take half its coefficient (-3.444444445).
Square it (11.86419753) and add it to both sides.

Add '11.86419753' to each side of the equation.
-6.888888889x + 11.86419753 + x2 = 12 + 11.86419753

Reorder the terms:
11.86419753 + -6.888888889x + x2 = 12 + 11.86419753

Combine like terms: 12 + 11.86419753 = 23.86419753
11.86419753 + -6.888888889x + x2 = 23.86419753

Factor a perfect square on the left side:
(x + -3.444444445)(x + -3.444444445) = 23.86419753

Calculate the square root of the right side: 4.885099541

Break this problem into two subproblems by setting 
(x + -3.444444445) equal to 4.885099541 and -4.885099541.

Subproblem 1

x + -3.444444445 = 4.885099541 Simplifying x + -3.444444445 = 4.885099541 Reorder the terms: -3.444444445 + x = 4.885099541 Solving -3.444444445 + x = 4.885099541 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.444444445' to each side of the equation. -3.444444445 + 3.444444445 + x = 4.885099541 + 3.444444445 Combine like terms: -3.444444445 + 3.444444445 = 0.000000000 0.000000000 + x = 4.885099541 + 3.444444445 x = 4.885099541 + 3.444444445 Combine like terms: 4.885099541 + 3.444444445 = 8.329543986 x = 8.329543986 Simplifying x = 8.329543986

Subproblem 2

x + -3.444444445 = -4.885099541 Simplifying x + -3.444444445 = -4.885099541 Reorder the terms: -3.444444445 + x = -4.885099541 Solving -3.444444445 + x = -4.885099541 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.444444445' to each side of the equation. -3.444444445 + 3.444444445 + x = -4.885099541 + 3.444444445 Combine like terms: -3.444444445 + 3.444444445 = 0.000000000 0.000000000 + x = -4.885099541 + 3.444444445 x = -4.885099541 + 3.444444445 Combine like terms: -4.885099541 + 3.444444445 = -1.440655096 x = -1.440655096 Simplifying x = -1.440655096

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.329543986, -1.440655096}

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