6x(x+12)=5-x

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Solution for 6x(x+12)=5-x equation:


Simplifying
6x(x + 12) = 5 + -1x

Reorder the terms:
6x(12 + x) = 5 + -1x
(12 * 6x + x * 6x) = 5 + -1x
(72x + 6x2) = 5 + -1x

Solving
72x + 6x2 = 5 + -1x

Solving for variable 'x'.

Reorder the terms:
-5 + 72x + x + 6x2 = 5 + -1x + -5 + x

Combine like terms: 72x + x = 73x
-5 + 73x + 6x2 = 5 + -1x + -5 + x

Reorder the terms:
-5 + 73x + 6x2 = 5 + -5 + -1x + x

Combine like terms: 5 + -5 = 0
-5 + 73x + 6x2 = 0 + -1x + x
-5 + 73x + 6x2 = -1x + x

Combine like terms: -1x + x = 0
-5 + 73x + 6x2 = 0

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

Divide each side by '6'.
-0.8333333333 + 12.16666667x + x2 = 0

Move the constant term to the right:

Add '0.8333333333' to each side of the equation.
-0.8333333333 + 12.16666667x + 0.8333333333 + x2 = 0 + 0.8333333333

Reorder the terms:
-0.8333333333 + 0.8333333333 + 12.16666667x + x2 = 0 + 0.8333333333

Combine like terms: -0.8333333333 + 0.8333333333 = 0.0000000000
0.0000000000 + 12.16666667x + x2 = 0 + 0.8333333333
12.16666667x + x2 = 0 + 0.8333333333

Combine like terms: 0 + 0.8333333333 = 0.8333333333
12.16666667x + x2 = 0.8333333333

The x term is 12.16666667x.  Take half its coefficient (6.083333335).
Square it (37.00694446) and add it to both sides.

Add '37.00694446' to each side of the equation.
12.16666667x + 37.00694446 + x2 = 0.8333333333 + 37.00694446

Reorder the terms:
37.00694446 + 12.16666667x + x2 = 0.8333333333 + 37.00694446

Combine like terms: 0.8333333333 + 37.00694446 = 37.8402777933
37.00694446 + 12.16666667x + x2 = 37.8402777933

Factor a perfect square on the left side:
(x + 6.083333335)(x + 6.083333335) = 37.8402777933

Calculate the square root of the right side: 6.151445179

Break this problem into two subproblems by setting 
(x + 6.083333335) equal to 6.151445179 and -6.151445179.

Subproblem 1

x + 6.083333335 = 6.151445179 Simplifying x + 6.083333335 = 6.151445179 Reorder the terms: 6.083333335 + x = 6.151445179 Solving 6.083333335 + x = 6.151445179 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.083333335' to each side of the equation. 6.083333335 + -6.083333335 + x = 6.151445179 + -6.083333335 Combine like terms: 6.083333335 + -6.083333335 = 0.000000000 0.000000000 + x = 6.151445179 + -6.083333335 x = 6.151445179 + -6.083333335 Combine like terms: 6.151445179 + -6.083333335 = 0.068111844 x = 0.068111844 Simplifying x = 0.068111844

Subproblem 2

x + 6.083333335 = -6.151445179 Simplifying x + 6.083333335 = -6.151445179 Reorder the terms: 6.083333335 + x = -6.151445179 Solving 6.083333335 + x = -6.151445179 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.083333335' to each side of the equation. 6.083333335 + -6.083333335 + x = -6.151445179 + -6.083333335 Combine like terms: 6.083333335 + -6.083333335 = 0.000000000 0.000000000 + x = -6.151445179 + -6.083333335 x = -6.151445179 + -6.083333335 Combine like terms: -6.151445179 + -6.083333335 = -12.234778514 x = -12.234778514 Simplifying x = -12.234778514

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.068111844, -12.234778514}

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