9x^2+13x-96=0

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Solution for 9x^2+13x-96=0 equation:


Simplifying
9x2 + 13x + -96 = 0

Reorder the terms:
-96 + 13x + 9x2 = 0

Solving
-96 + 13x + 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'.
-10.66666667 + 1.444444444x + x2 = 0

Move the constant term to the right:

Add '10.66666667' to each side of the equation.
-10.66666667 + 1.444444444x + 10.66666667 + x2 = 0 + 10.66666667

Reorder the terms:
-10.66666667 + 10.66666667 + 1.444444444x + x2 = 0 + 10.66666667

Combine like terms: -10.66666667 + 10.66666667 = 0.00000000
0.00000000 + 1.444444444x + x2 = 0 + 10.66666667
1.444444444x + x2 = 0 + 10.66666667

Combine like terms: 0 + 10.66666667 = 10.66666667
1.444444444x + x2 = 10.66666667

The x term is 1.444444444x.  Take half its coefficient (0.722222222).
Square it (0.5216049380) and add it to both sides.

Add '0.5216049380' to each side of the equation.
1.444444444x + 0.5216049380 + x2 = 10.66666667 + 0.5216049380

Reorder the terms:
0.5216049380 + 1.444444444x + x2 = 10.66666667 + 0.5216049380

Combine like terms: 10.66666667 + 0.5216049380 = 11.188271608
0.5216049380 + 1.444444444x + x2 = 11.188271608

Factor a perfect square on the left side:
(x + 0.722222222)(x + 0.722222222) = 11.188271608

Calculate the square root of the right side: 3.344887383

Break this problem into two subproblems by setting 
(x + 0.722222222) equal to 3.344887383 and -3.344887383.

Subproblem 1

x + 0.722222222 = 3.344887383 Simplifying x + 0.722222222 = 3.344887383 Reorder the terms: 0.722222222 + x = 3.344887383 Solving 0.722222222 + x = 3.344887383 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.722222222' to each side of the equation. 0.722222222 + -0.722222222 + x = 3.344887383 + -0.722222222 Combine like terms: 0.722222222 + -0.722222222 = 0.000000000 0.000000000 + x = 3.344887383 + -0.722222222 x = 3.344887383 + -0.722222222 Combine like terms: 3.344887383 + -0.722222222 = 2.622665161 x = 2.622665161 Simplifying x = 2.622665161

Subproblem 2

x + 0.722222222 = -3.344887383 Simplifying x + 0.722222222 = -3.344887383 Reorder the terms: 0.722222222 + x = -3.344887383 Solving 0.722222222 + x = -3.344887383 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.722222222' to each side of the equation. 0.722222222 + -0.722222222 + x = -3.344887383 + -0.722222222 Combine like terms: 0.722222222 + -0.722222222 = 0.000000000 0.000000000 + x = -3.344887383 + -0.722222222 x = -3.344887383 + -0.722222222 Combine like terms: -3.344887383 + -0.722222222 = -4.067109605 x = -4.067109605 Simplifying x = -4.067109605

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.622665161, -4.067109605}

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