0.5*x*(x+6)=11664

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Solution for 0.5*x*(x+6)=11664 equation:


Simplifying
0.5x(x + 6) = 11664

Reorder the terms:
0.5x(6 + x) = 11664
(6 * 0.5x + x * 0.5x) = 11664
(3x + 0.5x2) = 11664

Solving
3x + 0.5x2 = 11664

Solving for variable 'x'.

Reorder the terms:
-11664 + 3x + 0.5x2 = 11664 + -11664

Combine like terms: 11664 + -11664 = 0
-11664 + 3x + 0.5x2 = 0

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

Divide each side by '0.5'.
-23328 + 6x + x2 = 0

Move the constant term to the right:

Add '23328' to each side of the equation.
-23328 + 6x + 23328 + x2 = 0 + 23328

Reorder the terms:
-23328 + 23328 + 6x + x2 = 0 + 23328

Combine like terms: -23328 + 23328 = 0
0 + 6x + x2 = 0 + 23328
6x + x2 = 0 + 23328

Combine like terms: 0 + 23328 = 23328
6x + x2 = 23328

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 23328 + 9

Reorder the terms:
9 + 6x + x2 = 23328 + 9

Combine like terms: 23328 + 9 = 23337
9 + 6x + x2 = 23337

Factor a perfect square on the left side:
(x + 3)(x + 3) = 23337

Calculate the square root of the right side: 152.764524678

Break this problem into two subproblems by setting 
(x + 3) equal to 152.764524678 and -152.764524678.

Subproblem 1

x + 3 = 152.764524678 Simplifying x + 3 = 152.764524678 Reorder the terms: 3 + x = 152.764524678 Solving 3 + x = 152.764524678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 152.764524678 + -3 Combine like terms: 3 + -3 = 0 0 + x = 152.764524678 + -3 x = 152.764524678 + -3 Combine like terms: 152.764524678 + -3 = 149.764524678 x = 149.764524678 Simplifying x = 149.764524678

Subproblem 2

x + 3 = -152.764524678 Simplifying x + 3 = -152.764524678 Reorder the terms: 3 + x = -152.764524678 Solving 3 + x = -152.764524678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -152.764524678 + -3 Combine like terms: 3 + -3 = 0 0 + x = -152.764524678 + -3 x = -152.764524678 + -3 Combine like terms: -152.764524678 + -3 = -155.764524678 x = -155.764524678 Simplifying x = -155.764524678

Solution

The solution to the problem is based on the solutions from the subproblems. x = {149.764524678, -155.764524678}

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