0=9+6x+x^2-39

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Solution for 0=9+6x+x^2-39 equation:


Simplifying
0 = 9 + 6x + x2 + -39

Reorder the terms:
0 = 9 + -39 + 6x + x2

Combine like terms: 9 + -39 = -30
0 = -30 + 6x + x2

Solving
0 = -30 + 6x + x2

Solving for variable 'x'.

Combine like terms: 0 + 30 = 30
30 + -6x + -1x2 = -30 + 6x + x2 + 30 + -6x + -1x2

Reorder the terms:
30 + -6x + -1x2 = -30 + 30 + 6x + -6x + x2 + -1x2

Combine like terms: -30 + 30 = 0
30 + -6x + -1x2 = 0 + 6x + -6x + x2 + -1x2
30 + -6x + -1x2 = 6x + -6x + x2 + -1x2

Combine like terms: 6x + -6x = 0
30 + -6x + -1x2 = 0 + x2 + -1x2
30 + -6x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
30 + -6x + -1x2 = 0

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

Divide each side by '-1'.
-30 + 6x + x2 = 0

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + 6x + 30 + x2 = 0 + 30

Reorder the terms:
-30 + 30 + 6x + x2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + 6x + x2 = 0 + 30
6x + x2 = 0 + 30

Combine like terms: 0 + 30 = 30
6x + x2 = 30

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 = 30 + 9

Reorder the terms:
9 + 6x + x2 = 30 + 9

Combine like terms: 30 + 9 = 39
9 + 6x + x2 = 39

Factor a perfect square on the left side:
(x + 3)(x + 3) = 39

Calculate the square root of the right side: 6.244997998

Break this problem into two subproblems by setting 
(x + 3) equal to 6.244997998 and -6.244997998.

Subproblem 1

x + 3 = 6.244997998 Simplifying x + 3 = 6.244997998 Reorder the terms: 3 + x = 6.244997998 Solving 3 + x = 6.244997998 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 = 6.244997998 + -3 Combine like terms: 3 + -3 = 0 0 + x = 6.244997998 + -3 x = 6.244997998 + -3 Combine like terms: 6.244997998 + -3 = 3.244997998 x = 3.244997998 Simplifying x = 3.244997998

Subproblem 2

x + 3 = -6.244997998 Simplifying x + 3 = -6.244997998 Reorder the terms: 3 + x = -6.244997998 Solving 3 + x = -6.244997998 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 = -6.244997998 + -3 Combine like terms: 3 + -3 = 0 0 + x = -6.244997998 + -3 x = -6.244997998 + -3 Combine like terms: -6.244997998 + -3 = -9.244997998 x = -9.244997998 Simplifying x = -9.244997998

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.244997998, -9.244997998}

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