(x-0)=36-12x-5x^2

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Solution for (x-0)=36-12x-5x^2 equation:


Simplifying
(x + 0) = 36 + -12x + -5x2

Reorder the terms:
(0 + x) = 36 + -12x + -5x2
Remove the zero:
(x) = 36 + -12x + -5x2
x = 36 + -12x + -5x2

Solving
x = 36 + -12x + -5x2

Solving for variable 'x'.

Reorder the terms:
-36 + x + 12x + 5x2 = 36 + -12x + -5x2 + -36 + 12x + 5x2

Combine like terms: x + 12x = 13x
-36 + 13x + 5x2 = 36 + -12x + -5x2 + -36 + 12x + 5x2

Reorder the terms:
-36 + 13x + 5x2 = 36 + -36 + -12x + 12x + -5x2 + 5x2

Combine like terms: 36 + -36 = 0
-36 + 13x + 5x2 = 0 + -12x + 12x + -5x2 + 5x2
-36 + 13x + 5x2 = -12x + 12x + -5x2 + 5x2

Combine like terms: -12x + 12x = 0
-36 + 13x + 5x2 = 0 + -5x2 + 5x2
-36 + 13x + 5x2 = -5x2 + 5x2

Combine like terms: -5x2 + 5x2 = 0
-36 + 13x + 5x2 = 0

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

Divide each side by '5'.
-7.2 + 2.6x + x2 = 0

Move the constant term to the right:

Add '7.2' to each side of the equation.
-7.2 + 2.6x + 7.2 + x2 = 0 + 7.2

Reorder the terms:
-7.2 + 7.2 + 2.6x + x2 = 0 + 7.2

Combine like terms: -7.2 + 7.2 = 0.0
0.0 + 2.6x + x2 = 0 + 7.2
2.6x + x2 = 0 + 7.2

Combine like terms: 0 + 7.2 = 7.2
2.6x + x2 = 7.2

The x term is 2.6x.  Take half its coefficient (1.3).
Square it (1.69) and add it to both sides.

Add '1.69' to each side of the equation.
2.6x + 1.69 + x2 = 7.2 + 1.69

Reorder the terms:
1.69 + 2.6x + x2 = 7.2 + 1.69

Combine like terms: 7.2 + 1.69 = 8.89
1.69 + 2.6x + x2 = 8.89

Factor a perfect square on the left side:
(x + 1.3)(x + 1.3) = 8.89

Calculate the square root of the right side: 2.981610303

Break this problem into two subproblems by setting 
(x + 1.3) equal to 2.981610303 and -2.981610303.

Subproblem 1

x + 1.3 = 2.981610303 Simplifying x + 1.3 = 2.981610303 Reorder the terms: 1.3 + x = 2.981610303 Solving 1.3 + x = 2.981610303 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.3' to each side of the equation. 1.3 + -1.3 + x = 2.981610303 + -1.3 Combine like terms: 1.3 + -1.3 = 0.0 0.0 + x = 2.981610303 + -1.3 x = 2.981610303 + -1.3 Combine like terms: 2.981610303 + -1.3 = 1.681610303 x = 1.681610303 Simplifying x = 1.681610303

Subproblem 2

x + 1.3 = -2.981610303 Simplifying x + 1.3 = -2.981610303 Reorder the terms: 1.3 + x = -2.981610303 Solving 1.3 + x = -2.981610303 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.3' to each side of the equation. 1.3 + -1.3 + x = -2.981610303 + -1.3 Combine like terms: 1.3 + -1.3 = 0.0 0.0 + x = -2.981610303 + -1.3 x = -2.981610303 + -1.3 Combine like terms: -2.981610303 + -1.3 = -4.281610303 x = -4.281610303 Simplifying x = -4.281610303

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.681610303, -4.281610303}

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