3x^2+9.5x+18.5=0

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Solution for 3x^2+9.5x+18.5=0 equation:


Simplifying
3x2 + 9.5x + 18.5 = 0

Reorder the terms:
18.5 + 9.5x + 3x2 = 0

Solving
18.5 + 9.5x + 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'.
6.166666667 + 3.166666667x + x2 = 0

Move the constant term to the right:

Add '-6.166666667' to each side of the equation.
6.166666667 + 3.166666667x + -6.166666667 + x2 = 0 + -6.166666667

Reorder the terms:
6.166666667 + -6.166666667 + 3.166666667x + x2 = 0 + -6.166666667

Combine like terms: 6.166666667 + -6.166666667 = 0.000000000
0.000000000 + 3.166666667x + x2 = 0 + -6.166666667
3.166666667x + x2 = 0 + -6.166666667

Combine like terms: 0 + -6.166666667 = -6.166666667
3.166666667x + x2 = -6.166666667

The x term is 3.166666667x.  Take half its coefficient (1.583333334).
Square it (2.506944447) and add it to both sides.

Add '2.506944447' to each side of the equation.
3.166666667x + 2.506944447 + x2 = -6.166666667 + 2.506944447

Reorder the terms:
2.506944447 + 3.166666667x + x2 = -6.166666667 + 2.506944447

Combine like terms: -6.166666667 + 2.506944447 = -3.65972222
2.506944447 + 3.166666667x + x2 = -3.65972222

Factor a perfect square on the left side:
(x + 1.583333334)(x + 1.583333334) = -3.65972222

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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