432=x^2+12x+36

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Solution for 432=x^2+12x+36 equation:


Simplifying
432 = x2 + 12x + 36

Reorder the terms:
432 = 36 + 12x + x2

Solving
432 = 36 + 12x + x2

Solving for variable 'x'.

Combine like terms: 432 + -36 = 396
396 + -12x + -1x2 = 36 + 12x + x2 + -36 + -12x + -1x2

Reorder the terms:
396 + -12x + -1x2 = 36 + -36 + 12x + -12x + x2 + -1x2

Combine like terms: 36 + -36 = 0
396 + -12x + -1x2 = 0 + 12x + -12x + x2 + -1x2
396 + -12x + -1x2 = 12x + -12x + x2 + -1x2

Combine like terms: 12x + -12x = 0
396 + -12x + -1x2 = 0 + x2 + -1x2
396 + -12x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
396 + -12x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-396 + 12x + x2 = 0

Move the constant term to the right:

Add '396' to each side of the equation.
-396 + 12x + 396 + x2 = 0 + 396

Reorder the terms:
-396 + 396 + 12x + x2 = 0 + 396

Combine like terms: -396 + 396 = 0
0 + 12x + x2 = 0 + 396
12x + x2 = 0 + 396

Combine like terms: 0 + 396 = 396
12x + x2 = 396

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = 396 + 36

Reorder the terms:
36 + 12x + x2 = 396 + 36

Combine like terms: 396 + 36 = 432
36 + 12x + x2 = 432

Factor a perfect square on the left side:
(x + 6)(x + 6) = 432

Calculate the square root of the right side: 20.784609691

Break this problem into two subproblems by setting 
(x + 6) equal to 20.784609691 and -20.784609691.

Subproblem 1

x + 6 = 20.784609691 Simplifying x + 6 = 20.784609691 Reorder the terms: 6 + x = 20.784609691 Solving 6 + x = 20.784609691 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 20.784609691 + -6 Combine like terms: 6 + -6 = 0 0 + x = 20.784609691 + -6 x = 20.784609691 + -6 Combine like terms: 20.784609691 + -6 = 14.784609691 x = 14.784609691 Simplifying x = 14.784609691

Subproblem 2

x + 6 = -20.784609691 Simplifying x + 6 = -20.784609691 Reorder the terms: 6 + x = -20.784609691 Solving 6 + x = -20.784609691 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -20.784609691 + -6 Combine like terms: 6 + -6 = 0 0 + x = -20.784609691 + -6 x = -20.784609691 + -6 Combine like terms: -20.784609691 + -6 = -26.784609691 x = -26.784609691 Simplifying x = -26.784609691

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.784609691, -26.784609691}

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