3x+9x^2+8=0

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Solution for 3x+9x^2+8=0 equation:


Simplifying
3x + 9x2 + 8 = 0

Reorder the terms:
8 + 3x + 9x2 = 0

Solving
8 + 3x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
0.8888888889 + 0.3333333333x + x2 = 0

Move the constant term to the right:

Add '-0.8888888889' to each side of the equation.
0.8888888889 + 0.3333333333x + -0.8888888889 + x2 = 0 + -0.8888888889

Reorder the terms:
0.8888888889 + -0.8888888889 + 0.3333333333x + x2 = 0 + -0.8888888889

Combine like terms: 0.8888888889 + -0.8888888889 = 0.0000000000
0.0000000000 + 0.3333333333x + x2 = 0 + -0.8888888889
0.3333333333x + x2 = 0 + -0.8888888889

Combine like terms: 0 + -0.8888888889 = -0.8888888889
0.3333333333x + x2 = -0.8888888889

The x term is 0.3333333333x.  Take half its coefficient (0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
0.3333333333x + 0.02777777779 + x2 = -0.8888888889 + 0.02777777779

Reorder the terms:
0.02777777779 + 0.3333333333x + x2 = -0.8888888889 + 0.02777777779

Combine like terms: -0.8888888889 + 0.02777777779 = -0.86111111111
0.02777777779 + 0.3333333333x + x2 = -0.86111111111

Factor a perfect square on the left side:
(x + 0.1666666667)(x + 0.1666666667) = -0.86111111111

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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