3x^2+18x+22=0

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Solution for 3x^2+18x+22=0 equation:


Simplifying
3x2 + 18x + 22 = 0

Reorder the terms:
22 + 18x + 3x2 = 0

Solving
22 + 18x + 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'.
7.333333333 + 6x + x2 = 0

Move the constant term to the right:

Add '-7.333333333' to each side of the equation.
7.333333333 + 6x + -7.333333333 + x2 = 0 + -7.333333333

Reorder the terms:
7.333333333 + -7.333333333 + 6x + x2 = 0 + -7.333333333

Combine like terms: 7.333333333 + -7.333333333 = 0.000000000
0.000000000 + 6x + x2 = 0 + -7.333333333
6x + x2 = 0 + -7.333333333

Combine like terms: 0 + -7.333333333 = -7.333333333
6x + x2 = -7.333333333

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 = -7.333333333 + 9

Reorder the terms:
9 + 6x + x2 = -7.333333333 + 9

Combine like terms: -7.333333333 + 9 = 1.666666667
9 + 6x + x2 = 1.666666667

Factor a perfect square on the left side:
(x + 3)(x + 3) = 1.666666667

Calculate the square root of the right side: 1.290994449

Break this problem into two subproblems by setting 
(x + 3) equal to 1.290994449 and -1.290994449.

Subproblem 1

x + 3 = 1.290994449 Simplifying x + 3 = 1.290994449 Reorder the terms: 3 + x = 1.290994449 Solving 3 + x = 1.290994449 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 = 1.290994449 + -3 Combine like terms: 3 + -3 = 0 0 + x = 1.290994449 + -3 x = 1.290994449 + -3 Combine like terms: 1.290994449 + -3 = -1.709005551 x = -1.709005551 Simplifying x = -1.709005551

Subproblem 2

x + 3 = -1.290994449 Simplifying x + 3 = -1.290994449 Reorder the terms: 3 + x = -1.290994449 Solving 3 + x = -1.290994449 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 = -1.290994449 + -3 Combine like terms: 3 + -3 = 0 0 + x = -1.290994449 + -3 x = -1.290994449 + -3 Combine like terms: -1.290994449 + -3 = -4.290994449 x = -4.290994449 Simplifying x = -4.290994449

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.709005551, -4.290994449}

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