x^2+6x+27=66

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Solution for x^2+6x+27=66 equation:


Simplifying
x2 + 6x + 27 = 66

Reorder the terms:
27 + 6x + x2 = 66

Solving
27 + 6x + x2 = 66

Solving for variable 'x'.

Reorder the terms:
27 + -66 + 6x + x2 = 66 + -66

Combine like terms: 27 + -66 = -39
-39 + 6x + x2 = 66 + -66

Combine like terms: 66 + -66 = 0
-39 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '39' to each side of the equation.
-39 + 6x + 39 + x2 = 0 + 39

Reorder the terms:
-39 + 39 + 6x + x2 = 0 + 39

Combine like terms: -39 + 39 = 0
0 + 6x + x2 = 0 + 39
6x + x2 = 0 + 39

Combine like terms: 0 + 39 = 39
6x + x2 = 39

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 = 39 + 9

Reorder the terms:
9 + 6x + x2 = 39 + 9

Combine like terms: 39 + 9 = 48
9 + 6x + x2 = 48

Factor a perfect square on the left side:
(x + 3)(x + 3) = 48

Calculate the square root of the right side: 6.92820323

Break this problem into two subproblems by setting 
(x + 3) equal to 6.92820323 and -6.92820323.

Subproblem 1

x + 3 = 6.92820323 Simplifying x + 3 = 6.92820323 Reorder the terms: 3 + x = 6.92820323 Solving 3 + x = 6.92820323 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 = 6.92820323 + -3 Combine like terms: 3 + -3 = 0 0 + x = 6.92820323 + -3 x = 6.92820323 + -3 Combine like terms: 6.92820323 + -3 = 3.92820323 x = 3.92820323 Simplifying x = 3.92820323

Subproblem 2

x + 3 = -6.92820323 Simplifying x + 3 = -6.92820323 Reorder the terms: 3 + x = -6.92820323 Solving 3 + x = -6.92820323 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 = -6.92820323 + -3 Combine like terms: 3 + -3 = 0 0 + x = -6.92820323 + -3 x = -6.92820323 + -3 Combine like terms: -6.92820323 + -3 = -9.92820323 x = -9.92820323 Simplifying x = -9.92820323

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.92820323, -9.92820323}

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