x(x+6)=204

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Solution for x(x+6)=204 equation:


Simplifying
x(x + 6) = 204

Reorder the terms:
x(6 + x) = 204
(6 * x + x * x) = 204
(6x + x2) = 204

Solving
6x + x2 = 204

Solving for variable 'x'.

Reorder the terms:
-204 + 6x + x2 = 204 + -204

Combine like terms: 204 + -204 = 0
-204 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '204' to each side of the equation.
-204 + 6x + 204 + x2 = 0 + 204

Reorder the terms:
-204 + 204 + 6x + x2 = 0 + 204

Combine like terms: -204 + 204 = 0
0 + 6x + x2 = 0 + 204
6x + x2 = 0 + 204

Combine like terms: 0 + 204 = 204
6x + x2 = 204

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 = 204 + 9

Reorder the terms:
9 + 6x + x2 = 204 + 9

Combine like terms: 204 + 9 = 213
9 + 6x + x2 = 213

Factor a perfect square on the left side:
(x + 3)(x + 3) = 213

Calculate the square root of the right side: 14.594519519

Break this problem into two subproblems by setting 
(x + 3) equal to 14.594519519 and -14.594519519.

Subproblem 1

x + 3 = 14.594519519 Simplifying x + 3 = 14.594519519 Reorder the terms: 3 + x = 14.594519519 Solving 3 + x = 14.594519519 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 = 14.594519519 + -3 Combine like terms: 3 + -3 = 0 0 + x = 14.594519519 + -3 x = 14.594519519 + -3 Combine like terms: 14.594519519 + -3 = 11.594519519 x = 11.594519519 Simplifying x = 11.594519519

Subproblem 2

x + 3 = -14.594519519 Simplifying x + 3 = -14.594519519 Reorder the terms: 3 + x = -14.594519519 Solving 3 + x = -14.594519519 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 = -14.594519519 + -3 Combine like terms: 3 + -3 = 0 0 + x = -14.594519519 + -3 x = -14.594519519 + -3 Combine like terms: -14.594519519 + -3 = -17.594519519 x = -17.594519519 Simplifying x = -17.594519519

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.594519519, -17.594519519}

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