3x^2+2x+18=0

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

Simplifying
3x2 + 2x + 18 = 0

Reorder the terms:
18 + 2x + 3x2 = 0

Solving
18 + 2x + 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'.
6 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + 0.6666666667x + -6 + x2 = 0 + -6

Reorder the terms:
6 + -6 + 0.6666666667x + x2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 0.6666666667x + x2 = 0 + -6
0.6666666667x + x2 = 0 + -6

Combine like terms: 0 + -6 = -6
0.6666666667x + x2 = -6

The x term is 0.6666666667x.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x + 0.1111111112 + x2 = -6 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = -6 + 0.1111111112

Combine like terms: -6 + 0.1111111112 = -5.8888888888
0.1111111112 + 0.6666666667x + x2 = -5.8888888888

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = -5.8888888888

Can't calculate square root of the right side.

The solution to this equation could not be determined.