18x^2+8x+5=0

Solution for 18x^2+8x+5=0 equation:

Simplifying
18x2 + 8x + 5 = 0

Reorder the terms:
5 + 8x + 18x2 = 0

Solving
5 + 8x + 18x2 = 0

Solving for variable 'x'.

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

Divide each side by '18'.
0.2777777778 + 0.4444444444x + x2 = 0

Move the constant term to the right:

Add '-0.2777777778' to each side of the equation.
0.2777777778 + 0.4444444444x + -0.2777777778 + x2 = 0 + -0.2777777778

Reorder the terms:
0.2777777778 + -0.2777777778 + 0.4444444444x + x2 = 0 + -0.2777777778

Combine like terms: 0.2777777778 + -0.2777777778 = 0.0000000000
0.0000000000 + 0.4444444444x + x2 = 0 + -0.2777777778
0.4444444444x + x2 = 0 + -0.2777777778

Combine like terms: 0 + -0.2777777778 = -0.2777777778
0.4444444444x + x2 = -0.2777777778

The x term is 0.4444444444x.  Take half its coefficient (0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
0.4444444444x + 0.04938271604 + x2 = -0.2777777778 + 0.04938271604

Reorder the terms:
0.04938271604 + 0.4444444444x + x2 = -0.2777777778 + 0.04938271604

Combine like terms: -0.2777777778 + 0.04938271604 = -0.22839506176
0.04938271604 + 0.4444444444x + x2 = -0.22839506176

Factor a perfect square on the left side:
(x + 0.2222222222)(x + 0.2222222222) = -0.22839506176

Can't calculate square root of the right side.

The solution to this equation could not be determined.