3x^2+24x+28=0

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Solution for 3x^2+24x+28=0 equation: 


Simplifying
3x2 + 24x + 28 = 0

Reorder the terms:
28 + 24x + 3x2 = 0

Solving
28 + 24x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
9.333333333 + 8x + x2 = 0

Move the constant term to the right:

Add '-9.333333333' to each side of the equation.
9.333333333 + 8x + -9.333333333 + x2 = 0 + -9.333333333

Reorder the terms:
9.333333333 + -9.333333333 + 8x + x2 = 0 + -9.333333333

Combine like terms: 9.333333333 + -9.333333333 = 0.000000000
0.000000000 + 8x + x2 = 0 + -9.333333333
8x + x2 = 0 + -9.333333333

Combine like terms: 0 + -9.333333333 = -9.333333333
8x + x2 = -9.333333333

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -9.333333333 + 16

Reorder the terms:
16 + 8x + x2 = -9.333333333 + 16

Combine like terms: -9.333333333 + 16 = 6.666666667
16 + 8x + x2 = 6.666666667

Factor a perfect square on the left side:
(x + 4)(x + 4) = 6.666666667

Calculate the square root of the right side: 2.581988898

Break this problem into two subproblems by setting 
(x + 4) equal to 2.581988898 and -2.581988898.


Subproblem 1
x + 4 = 2.581988898

Simplifying
x + 4 = 2.581988898

Reorder the terms:
4 + x = 2.581988898

Solving
4 + x = 2.581988898

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + x = 2.581988898 + -4

Combine like terms: 4 + -4 = 0
0 + x = 2.581988898 + -4
x = 2.581988898 + -4

Combine like terms: 2.581988898 + -4 = -1.418011102
x = -1.418011102

Simplifying
x = -1.418011102


Subproblem 2
x + 4 = -2.581988898

Simplifying
x + 4 = -2.581988898

Reorder the terms:
4 + x = -2.581988898

Solving
4 + x = -2.581988898

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + x = -2.581988898 + -4

Combine like terms: 4 + -4 = 0
0 + x = -2.581988898 + -4
x = -2.581988898 + -4

Combine like terms: -2.581988898 + -4 = -6.581988898
x = -6.581988898

Simplifying
x = -6.581988898


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {-1.418011102, -6.581988898}

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