x^2+12x+5=30

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Solution for x^2+12x+5=30 equation:


Simplifying
x2 + 12x + 5 = 30

Reorder the terms:
5 + 12x + x2 = 30

Solving
5 + 12x + x2 = 30

Solving for variable 'x'.

Reorder the terms:
5 + -30 + 12x + x2 = 30 + -30

Combine like terms: 5 + -30 = -25
-25 + 12x + x2 = 30 + -30

Combine like terms: 30 + -30 = 0
-25 + 12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 12x + 25 + x2 = 0 + 25

Reorder the terms:
-25 + 25 + 12x + x2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 12x + x2 = 0 + 25
12x + x2 = 0 + 25

Combine like terms: 0 + 25 = 25
12x + x2 = 25

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 = 25 + 36

Reorder the terms:
36 + 12x + x2 = 25 + 36

Combine like terms: 25 + 36 = 61
36 + 12x + x2 = 61

Factor a perfect square on the left side:
(x + 6)(x + 6) = 61

Calculate the square root of the right side: 7.810249676

Break this problem into two subproblems by setting 
(x + 6) equal to 7.810249676 and -7.810249676.

Subproblem 1

x + 6 = 7.810249676 Simplifying x + 6 = 7.810249676 Reorder the terms: 6 + x = 7.810249676 Solving 6 + x = 7.810249676 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 = 7.810249676 + -6 Combine like terms: 6 + -6 = 0 0 + x = 7.810249676 + -6 x = 7.810249676 + -6 Combine like terms: 7.810249676 + -6 = 1.810249676 x = 1.810249676 Simplifying x = 1.810249676

Subproblem 2

x + 6 = -7.810249676 Simplifying x + 6 = -7.810249676 Reorder the terms: 6 + x = -7.810249676 Solving 6 + x = -7.810249676 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 = -7.810249676 + -6 Combine like terms: 6 + -6 = 0 0 + x = -7.810249676 + -6 x = -7.810249676 + -6 Combine like terms: -7.810249676 + -6 = -13.810249676 x = -13.810249676 Simplifying x = -13.810249676

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.810249676, -13.810249676}

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