x^2+13x=96

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Solution for x^2+13x=96 equation:


Simplifying
x2 + 13x = 96

Reorder the terms:
13x + x2 = 96

Solving
13x + x2 = 96

Solving for variable 'x'.

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

Combine like terms: 96 + -96 = 0
-96 + 13x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '96' to each side of the equation.
-96 + 13x + 96 + x2 = 0 + 96

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

Combine like terms: -96 + 96 = 0
0 + 13x + x2 = 0 + 96
13x + x2 = 0 + 96

Combine like terms: 0 + 96 = 96
13x + x2 = 96

The x term is 13x.  Take half its coefficient (6.5).
Square it (42.25) and add it to both sides.

Add '42.25' to each side of the equation.
13x + 42.25 + x2 = 96 + 42.25

Reorder the terms:
42.25 + 13x + x2 = 96 + 42.25

Combine like terms: 96 + 42.25 = 138.25
42.25 + 13x + x2 = 138.25

Factor a perfect square on the left side:
(x + 6.5)(x + 6.5) = 138.25

Calculate the square root of the right side: 11.757976016

Break this problem into two subproblems by setting 
(x + 6.5) equal to 11.757976016 and -11.757976016.

Subproblem 1

x + 6.5 = 11.757976016 Simplifying x + 6.5 = 11.757976016 Reorder the terms: 6.5 + x = 11.757976016 Solving 6.5 + x = 11.757976016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.5' to each side of the equation. 6.5 + -6.5 + x = 11.757976016 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + x = 11.757976016 + -6.5 x = 11.757976016 + -6.5 Combine like terms: 11.757976016 + -6.5 = 5.257976016 x = 5.257976016 Simplifying x = 5.257976016

Subproblem 2

x + 6.5 = -11.757976016 Simplifying x + 6.5 = -11.757976016 Reorder the terms: 6.5 + x = -11.757976016 Solving 6.5 + x = -11.757976016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.5' to each side of the equation. 6.5 + -6.5 + x = -11.757976016 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + x = -11.757976016 + -6.5 x = -11.757976016 + -6.5 Combine like terms: -11.757976016 + -6.5 = -18.257976016 x = -18.257976016 Simplifying x = -18.257976016

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.257976016, -18.257976016}

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